Reverse Percentage Calculator

Work backward from a known percentage value to find the complete amount. Enter the known value and the percentage it represents.

The calculator converts the percentage to a decimal and divides the known value by that decimal. A percentage of zero cannot identify a finite original amount.

Five percentage calculations

• Percent of calculates a percentage of a given number.
• What percent finds what percentage one value represents of another.
• Reverse percent finds the whole when a value and its percentage are known.
• Percent change compares a new value with its original value.
• Convert percent returns the equivalent decimal and simplified fraction.

Percentage change uses the absolute original value as the denominator, so direction remains meaningful when values are negative. A positive result is an increase and a negative result is a decrease. Change from an original value of zero is undefined because division by zero has no finite percentage result.

Related percentage calculations: Percentage Calculator · Percentage Change · Reverse Percentage · Percent to Decimal