Free Calculator

Percentage Calculator

Three handy percentage calculators in one: percent of a number, percent ratio, and percent change.

① What is X% of Y?
% of =
② X is what % of Y?
is what % of =
③ Percentage Change (from X to Y)
From to =

Formula: X% of Y

Result = (X ÷ 100) × Y. For example, 25% of 200 = (25÷100)×200 = 50.

Formula: X of Y as %

Percentage = (X ÷ Y) × 100. For example, 50 is 25% of 200 because (50÷200)×100 = 25.

Percentage Change

Change% = ((New – Old) ÷ Old) × 100. A positive result is an increase; negative is a decrease.