## âœ…What is a Percentage?

In mathematics, a percentage is a number or ratio that represents a fraction of 100.
It is one of the ways to represent a dimensionless relationship between two numbers;
other methods include ratios, fractions, and decimals. Percentages are often denoted
by the symbol "%" written after the number. They can also be denoted by writing "percent"
or "pct" after the number. For example, 35% is equivalent to the decimal 0.35, or
the fractions **35/100 and 7/20**

## âœ…Percentage formula

**ðŸ‘‰P Ã— V1 = V2**

**ðŸ‘‰EX: P Ã— 30 = 1.5
P =1.5/30 = 0.05 Ã— 100 = 5%**

## âœ…Percentage difference formula

**ðŸ‘‰Percentage Difference** =|V1 - V2|/((V1 + V2)/2)Ã— 100
**EX** : |10 - 6|/(10 + 6)/2 = 4/8 = 0.5 = 50%

## âœ…Percentage change formula

**ðŸ‘‰EX: 500 increased by 10% (0.1)**

500 Ã— (1 + 0.1) = 550

**ðŸ‘‰500 decreased by 10%**

500 Ã— (1 â€“ 0.1) = 450