Percentage Calculator

Free percentage calculator. Find what percent one number is of another, calculate percentage changes, and more.

X% of Y: Multiply Y by (X/100). Example: 25% of 200 = 200 × 0.25 = 50.

X is what % of Y: Divide X by Y and multiply by 100. Example: 50/200 × 100 = 25%.

% Change: ((New−Old)/Old) × 100. Positive = increase, negative = decrease.

What is 20% of 150? ▼

20% of 150 = 150 × 0.20 = 30.

How do I find a percentage increase? ▼

Formula: ((New − Old) / Old) × 100. For example, from 80 to 100 = (100−80)/80 × 100 = 25% increase.