Have you ever wondered how to calculate percentages quickly and effectively? If yes, then you are at the right place.
In this article, we will teach you a simple technique for calculating percentages that will allow you to perform this calculation in a matter of seconds.
Whether it’s for your personal finances or solving math problems at work, learning how to calculate percentages easily and efficiently is a skill definitely worth having.»
The percentage
The percentage is applied daily and we see advertising in stores with sales of 20%, 30% up to 50% discount every day.
But how to quickly apply these discounts without making it too complicated? One of the fastest ways is with these simple examples.
«10% off all orders of $99 and over» «Save 20% on your purchase of $100 or more!»
Mathematics knows no races or geographic boundaries. For mathematics, the cultural world is a country. david hilbert.
The steps to calculate percentages are as follows:
Determine the total number.Determine the percentage you want to find.Multiply the total number by the percentage expressed in decimal.Round the result to the desired number of decimal places.
For example, if we want to find 20% of 100, we first convert the percentage to a decimal (20% = 0.20) and then multiply 100 x 0.20 = 20. The result, 20, is the percentage we are looking for.
How to calculate the percentage of a final price?
Step 1 – Take the final price and divide it by the original price.
2000/1000=2
Step 2: Multiply the result by 100 to get the percentage.
2*100=200%
Knowing how to develop the percentage technique is the solution. The percentages or percentages are easy to calculate, although at first glance they may seem otherwise.
Percentages are calculated using the following equation: percentage = 100 x percentage / total 100% equals 1, so a percentage could be 0.1 (10%) or 10.739795714285.
To calculate percentages, simply divide the number of items by the total of all items. For example, if there are 10 widgets in a row and there are 100 pieces in a box, then 10% of 100 is 10.
It will not be necessary to learn a formula, it is possible to calculate it through the rule of 3
Example 1:
Let’s start with a very simple example to calculate.
If you have 30 colors, of which 7 are red, What is the percentage of red colors that exist?
7 Colors are Red30 It is the total of the colors100% It is the Total30 COLORS = 100%7 (RED) = x (this would be the equation to solve)
Photo Pixabay
How is the operation calculated?
The following elements are multiplied:
Step 1.
MULTIPLY 100 * 7 = 700
Step 2.
DIVIDE 700 / 30 = 23.3333
23.3333% IS THE PERCENTAGE OF RED COLORS
Another Example is the following:
The number to which you are going to find the percentage, multiply it by the percentage that interests you and divide it by 100.
3% of $100 is $3.00, so 3% x 100 = 300.
Example What is 25% of 40?
The number to which I am going to find the % is 40 and the percentage that interests is 25%.
Step 1
40 X 25 = 1000
Step 2
then divide the amount of the result by 100
1000 ÷ 100 = 10
Yet another example, what is 30% of 80?
80 X 30 = 2400
2400 ÷ 100 = 24
A More Practical Method
When you do not have a calculator or a computer at hand, it is possible to calculate it in a mental way.
Case 1
We have throughout the store the 25% discount and you want to buy a screen that costs 4249 pesos.
Solution:
In this case, to make a very quick calculation, the first thing we must do is round the figure.
The ideal is to leave it in 4200 or 4300in this way it will be easier to do the calculation.
I will choose 4,300 because I prefer that I have money left over from the calculation that I will carry out
Then he eliminated the two zeros that exist in the figure to simplify a little more, but I must remember how many there were to know how many I will add at the end
4,300 ==> 43
Simplifying is the key, so to keep things simple I will also simplify my percentage into 2 parts: 2 and 0.5
43*2 = 86
43 * 0.5 = 21.5 or what would be the same:
Half of 43 is 21.5
now add: 86+21.5= 87.5
Let’s remember that from 4,300 we removed 2 zeros, now we just have to add them, removing one, which in this case is rather a matter of going through the decimal point to the right: 875
How to get a percentage with a calculator
lesson
To get a percentage using a calculator, first use the calculator to divide the number by 100. Then open the calculator screen and divide the number by 100 to get the percentage.
Need another example?
100% of 25 equals 25. So you could say that I have a 25% chance of being sick if I have been sick at least one day this month. Excellent!
You can already make a percentage of 100!
Do you have a calculator?
So let’s make this easier!!!
I will give you a simpler example, a classic one:
There is a Night Sale, yes, those that everyone likes and you want to buy a Led Screen that has a price of $11,499. The entire Store is discounted by 20% and you want to know what the final price will be.
Personally, sometimes remembering which number goes between which I sometimes forget, but for this type of calculation we will omit the division, so there are 2 options:
Option 1:
morMultiply on your calculator 11,499 * 0.2
The result is: 2,299.8.
That will be the discount of your Screen.
If I want to know how much I will pay in the end I must subtract
11,499 – 2299.8 = 9,199.20
Option 2:
Since it seems more complicated to me to be taking out the discount and then subtracting it from the final amount, I prefer to do my calculations the other way around. This is that instead of multiplying by 20%, I multiply by 80%, which will be what I will pay at the end. To find out what you will pay in the end, you must subtract your discount percentage from 100, in this case it is 20, so 100 – 20 = 80.
Multiply 11,499 * 0.8
The result is 9,199.20
That is what I will pay in the end for the Screen 🙂
Practical Examples of Percentages
In the following examples, what is the percent that each number represents?
90%
9 out of 10 people
90% = 9 out of 10 people. 90% means nine out of 10 people.
Then there are other quick ways to calculate the percentages
A. To calculate 10% of 20: 10% of 20 = 2
B. To calculate 10% of 30: 10% of 30 = 3
A. To calculate 20% of 20: 20% of 20 = 4
B. To calculate 20% of 30: 20% of 30 = 6
How to Calculate Credit Card Interest
This is a very important issue, since many of us can have a hard time interpreting our credit card statements.
The first thing we should know before accepting or applying for a credit card is the interest that our purchases will have, which is often announced as CAT (Total Annual Cost), this is what it will cost you to be able to make purchases and pay them in time.
Credit card interest is calculated annually, but there are some that also charge late payment interest (for being late in paying on time), so you must be careful in the clauses of your contract.
“This is a very important issue, as many of us can find it difficult to interpret our credit card statements.”
-A very important issue- The first thing we should know before accepting or applying for a credit card is the interest our purchases will have.
Credit card interest is calculated annually, but there are some that also have monthly interest rates. The most common credit card interest rates are 16% to 25%.
The reason for the high rates is that it’s not just about how much you owe on the goods you buy, but also how much you can afford in a year or month.
Some credit cards even offer 0% interest on purchases if the balance is paid in full each month.
To avoid paying huge interest rates on your credit card every month, you should make sure you avoid carrying a balance and always pay your credit card in full every month.
Let’s give an example:
Your credit card has an interest of 40% per year.
if you must 3,000 but you couldn’t pay more than the minimum which depends on different things but let’s say it’s $150 your balance is $2,850 principal. Now let’s calculate the interest.
40% of the annual interest rate must be divided between the 12 months of the year and that will be your monthly interest. In this case: 3.33%
So to calculate your interest we can do the following:
Multiply $2,850 * 0.033 which is the best way to simplify the rule of 3 (we saved the last step of dividing by 100).
Your interest will be 94.05for some it may seem low, but if every month you pay something similar, then in a year you will have paid around $1000 only from…