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# Here’s how to calculate the percentage of a number with a simple trick

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During sales, you can take out your phone with caution to calculate the discount on the product of your choice or subtract the percentage of the discount. It is not always easy to calculate the applicable discounts. This beautiful blouse or skirt is on sale during the winter sale. 70% off the starting price, that’s huge! On a budget and this new price tag, I’ll be able to treat myself. But how much exactly? When it comes to calculating the discount expressed as a percentage, sometimes the mental arithmetic is missing. With this method, you can calculate the final value and therefore the purchase price and the amount of the reduction. This is a great way to save money.

## Simple trick to calculate the percentage of a number

How many students have always learned so many rules and formulas that are supposed to make everyday life easier? Addition, subtraction, multiplication, division, all these operations are subject to specific rules. It is very rare for an adult to not know their own multiplication tables. And for good reason, in elementary school, batting was a frequent question on constant exams. Once it reaches adulthood, one wonders what it was used for. Since we are used to programs such as Excel or calculators, learning the entire table seems useless to adults. Well, when you are shopping, you are sure to make a list to determine your budget. By purchasing 3 identical items, you can multiply the unit price by 3. Multiplication tables are very useful. When it comes to calculating a discount on a product, calculating the percentage goes through mastering the multiplication tables.

## How do you calculate the percentage in school?

Determine the percentage. Source: spm

In class, the rule of three, called the commutative product, was popular. This method is to find the unknown X. Let’s take an example of a simple arithmetic operation. Let’s set 60% out of 80, which is 100%. Since 80 is 100%, the unknown is 60%. It is enough to multiply 60 by 80 and divide the result by 100. It is the rule of three that makes it possible to find the unknown thanks to 3 data. The result is 48.

This method, admittedly simple, requires solving an equation.

## How do you simply calculate the percentage of a number?

According to a famous proverb dating back to the 15th century, it is by forging that one becomes a blacksmith. So let’s formulate.

This simple trick will allow you to make quick calculations and have your friends in on the fun when you are out shopping or trying to work out your share of the bill at the restaurant. There is no need for an arithmetic formula that includes a numerator and denominator.

Let’s choose a concrete example and let’s say that after having lunch on the balcony with 3 of your friends and your better half, you want to pay your part of the bill, which is €70, plus the last part. You will then have to calculate 40% of the €70. yes! For those who doubt it, two people are 40% of the five people out there, if you use rule 3.

But to calculate the share you have to pay, there is no need to use the rule of three. Like a premium calculator, instead of multiplying the numbers and then dividing the whole by 100, you multiply the first two of the numbers in question, 4 and 7. How much is 4 by 7? You will get a score of 28. That’s actually 40% of the €70.

Remember to share this tip with those around you. Why bother setting up a process or using a calculator when you know a quick and easy technique for calculating percentages? From now on, during the sales period, you can easily calculate the discount percentage for the product, find the initial value of an item and the amount of the discount, determine the new value of your monthly salary after the increase or apply the VAT rate to products purchased from your supplier or calculate shipping costs, the price Excluding taxes or including, etc.

Get out of the calculator and hello head count. This fun trick allows you to calculate quickly and math is much easier.