Tool

Percentage & Discount

Percent of a number: 20% of 80 = (20 ÷ 100) × 80 = 16.
Percent change: from 50 to 65 = (65 − 50) ÷ 50 × 100 = 30% increase.
Discount: $40 at 25% off = $40 − $10 = $30, and you save $10.

Three everyday percentage problems in one place. Pick the one you need.

How it works