How To Work Out Percentages

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This site is a step by step guide to master How to work out percentages  !

On this site you will find lot of examples and easy to understand explanations in text, and video tutorials.

After a short while you should be able to do the following :

How to work out

percentages of any given number

percentages increase or decrease

percentages on a calculator

percentages without a calculator

And much more

In order to master fully these techniques it is vital that you undertake plenty of practice exercises so that they become second nature.Go to this page.

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Start by watching this excellent explanation on this video


A percentage is a way of expressing a number as a fraction of a hundred, usually using the % sign.

How to Work Out Percentages ?

This question, which arises very often, is a recurring issue in daily life .Knowing how to work out percentages  will allow you to easily calculate a discount, to calculate the amount of VAT on a product due to its price off-tax or how much your money will earn you in saving account.

In short, we’ll give you a few tips and tricks to help you quickly calculate very easily a percentage in the different situations of everyday life.


A simple explanation is to say that:

A percentage is the fraction 1/100 (1 over 100 or 1 divided by 100) or to take any number and divide it by 100.


‘Percent’ means ‘per 100′. If 80 percent of the population own a car, this means that 80 out of every hundred people own a car. The symbol ‘%’ means ‘percent’.


How to calculate percentages Concept

how to work out percentages



Example of How to find out Percentages


Let’s watch this video for more insight:

so How do we calculate a percentage

To do this we will take a real life example:


First Example : What percentage of my spending over my initial budget?

I have 50 euros and I decided to spend 17 euros on the purchase of vegetables.

What percentage is this expenditure over my initial budget?

Solution: Nothing complicated,

just divide 17 euros by my initial budget is:

17/50 = 0.34

Then multiply the result by 100 to get a percentage:

0.34 X 100 = 34%

We have therefore used 34% of our total budget.


Second Example: How to find the percentage of my discount?

I buy a car to 9,000 euros after negotiations with the seller, I am happy because the original price was 11,000 euros.

But what is the percentage of my discount?



We had therefore  a reduction of:

11000 – 9000 = 2000 euros.

2000/11000 = 0.18 X 100 = 18%

So I got 18% discount

You will then be able  calculate a percentage without worries!

Third Example:  How to calculate a rebate by a trader?

A merchant gives you a 20% discount on a product whose price is 400 €. How do I know what price I will finally pay?


For this we assume a 20% discount means that the merchant gives you a € 20 discount for every € 100, in total € 80 discount for a 100 € (400/100 × 20) or (400 × 0.2). To calculate the price you ultimately pay is multiplied by € 400 0.8.

Fourth Example: how to calculate the interest that my savings will make in one year?

Suppose you put € 1,000 at a rate of 2.5% on a savings account. How much interest will this investment earn you 1 year?

Solution :

An annual rate of 2.5% means that you will receive € 2.5 to € 100 per year invested. If you invest € 1000 this investment will bring logically 10 × 2.5 € or 25 €.


If you ever experience some difficulties to work out percentages, do not hesitate to contact us with your questions