Percentage Calculator

Quickly calculate percentages with 4 different modes.

What is X% of Y?

Result: ?

How It Works

X% of Y: Multiply Y by X/100. For example, 15% of 200 = 30.

What % is X of Y: Divide X by Y, then multiply by 100. For example, 30 is 15% of 200.

Percentage change: Divide (Y - X) by |X|, then multiply by 100. For example, from 100 to 120 is a +20% change.

Apply a percentage: Multiply X by (1 + Y/100). For example, 100 + 20% = 120. Enter a negative value to decrease (e.g., -15 for a 15% reduction).