# Percentages Formulas

The word ‘percent’ is derived from the Latin word ‘Per centum’. It implies “out of every hundred”.The symbol ‘ %’ is used to denote percentage. For example, 20% means 20 out of 100. Each ratio can be expressed as a percentage. In this article, we will provide you some percentage formulas tricks and shortcuts which will help you solve the problems faster.

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**Percentage fraction conversion chart:**

Below is a list of important percentage formulas

1. To calculate p% of y

(p/100) y = (p x y)/100

P % of y = y % of p

2. What percentage of x is y :

y/x * 100

3. To calculate percentage change in value

% change = {change/(initial value)} x 100

4. Percentage point change

Difference of two percentage figures

5. Deccrease N by S %

N ( 1- S/100)

6. Increase N by S %

N(1 + S/100)

7. Successive Percentage Change

If there are a successive percentage increase of a% and b%, the effective percentage increase is:

{(a + b (ab/100)}%

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