# How to Calculate Percentage

## Percentage Calculator

% to Number    Number to %

### What is Percentage

Percentage is the numeric ratio expressed as a fraction of 100. It is denoted by the percent sign (%), and is used to express how large or small a number is in proportion to another number. The first number usually represents a part of the second number, which is also called a whole.

### Calculations

The most common and easiest way to calculate a percentage is by multiplying the numeric value of the ratio (part devided by whole) by 100. For example, to find 5 marbles as a percentage of 50 marbles, first compute the ratio, 5/50 = 0.1, and then multiply by 100 to get 10%. Another way of calculating is by multiplying 5 by 100 to give 500, and this result would be divided by 50 to give 10%.

### Formulas

Percent to Number :

```1) ( a / 100) * b = c

Where:
a = percentage
b = whole
c = part of whole```

Number to Percent :

```1) ( a / b) * 100 = Percentage
2) (a x 100) / b = Percentage

Where:
a = part of whole
b = whole```