Percentage Calculator

Calculate percent of a value, percentage share, percent change, and increase or decrease by percentage.

Calculation Type

%

Result

30

20% of 150 equals 30.

Remaining value

120

Value after subtracting 20%.

Formula

150 x 20 / 100 = 30
Common calculations

How Percentage Math Works

A percentage is a value out of 100. To find 20% of 150, convert 20% to 0.20 and multiply it by 150. The answer is 30.

Percent change compares a new value against an old value: subtract the old value from the new value, divide by the old value, then multiply by 100.

Common Uses

  • Calculate tax, tips, commissions, markups, and discounts
  • Compare growth or decline between two values
  • Find completion rate, score percentage, or share of a total
  • Increase or decrease prices, budgets, and measurements
  • Double-check spreadsheet percentage formulas quickly