Percentage calculator
Choose percent-of, percent ratio, or increase/decrease. BeanNest keeps the formula visible so the result is easy to verify.
Enter values and calculate to see the formula here.
Ready.
Three common formulas
(X ÷ 100) × Y answers questions such as “What is 15% of 200?”
(X ÷ Y) × 100 compares the part to the whole. The whole cannot be zero.
Y × (1 ± X/100) applies the change directly to the base value.
Yes. Values such as 2.5% or 12.75 are accepted.
“Percent of,” “what percent,” and “change by percent” are different questions. Separate modes prevent one ambiguous input form from silently using the wrong relationship.
Keep checking
Run everyday arithmetic with keyboard or touch input, percentages, sign changes, square roots, and one-click result copy.
Open tool →Simplify whole-number ratios or solve a missing value in a proportion with the cross-multiplication formula shown.
Open tool →Add, subtract, multiply, and divide exact fractions with automatic reduction and mixed-number output when useful.
Open tool →