Ratios

Percentage Calculator

Three common questions, answered instantly as you type.

What is X% of Y?

Percent

Of value

Result 43.2

X is what percent of Y?

Value X

Of value Y

Result 15%

Percent change from X to Y

From (X)

To (Y)

Change +25%

A positive value is an increase, negative is a decrease.

About this tool

Percentage questions usually come in one of three shapes: finding a share of a number, expressing one number as a percent of another, or measuring the change between two values. This tool solves all three side by side, live as you type.

Quick trick

10% first

Move the decimal one place left to get 10% of any number, then scale up or down from there in your head.