How it works
- X% of Y = X ÷ 100 × Y.
- A is what % of B = A ÷ B × 100.
- Percentage change from A to B = (B − A) ÷ |A| × 100.
Frequently asked questions
What is the difference between percent and percentage points?
Going from 10% to 15% is a 5 percentage-point increase but a 50% relative increase.
Why can't I calculate change from zero?
A change from 0 is undefined as a percentage because you would be dividing by zero.
Results are estimates for general information and are not financial, medical or professional advice.