Calculators / Percentage Calculator

➗ Percentage Calculator

The three percentage problems everyone hits — discounts, marks, raises, growth — solved instantly as you type.

What is X% of Y?

% of = —

X is what percent of Y?

is what % of = —

Percentage change from X to Y

From to = —

The three formulas

X% of Y = (X ÷ 100) × Y — e.g. a 15% tip on ₹2,400 is ₹360.
X as a % of Y = (X ÷ Y) × 100 — e.g. 45 marks out of 180 is 25%.
% change = ((new − old) ÷ old) × 100 — e.g. going from 120 to 150 is a +25% increase.

Percentage points vs percent

If interest rates move from 4% to 5%, that's a rise of 1 percentage point but a 25% relative increase. Mixing these up is the most common percentage mistake in news and reports.