∑ Basic Calculators

Core percentage formulas — find a percent of a number, convert fractions, ratios, and decimals.

Instantly calculate what percent of a number is. Enter X and Y to find X% of Y with formula, steps, and examples.

Find what percentage one number is of another. Calculate “25 is what percent of 200?” with live steps and formula.

Find the whole when you know a part and its percentage. Solve “25 is 20% of what?” instantly.

Convert any percentage to a decimal instantly. Example: 75% = 0.75.

Convert decimals to percentages. Example: 0.125 = 12.5%.

Convert fractions to percentages. Example: 3/8 = 37.5%.

Convert percentages to simplified fractions. Example: 45% = 9/20.

Convert a ratio to a percentage. Example: 3:5 = 60%.

Convert a percentage to a simplified ratio. Example: 40% = 2:5.

Find how much percent more or less one number is than another. Example: 120 is 20% more than 100.

Calculate one percentage of another. Example: 20% of 50% = 10%. Shows the result as a percentage and a decimal.