Percentage Calculator

1) What is X% of Y?

X (%) Y

2) A is what % of B?

A B

3) % Change from Old to New

Old New

How Percentage Works

X% of Y = (X/100) × Y
Percent of = (A/B) × 100%
Percent change = ((New − Old)/Old) × 100%

Use this page for discounts, markups, scores, and growth rates.