01

What is a percentage of a number?

Calculate X% of a given number.

FORMULA
Result = (Percentage ÷ 100) × Number
%
02

What percentage is one number of another?

Find what percentage one number represents of another number.

FORMULA
Percentage = (Number ÷ Total) × 100
03

Percentage Change

Calculate the percentage change from an original value to a new value.

FORMULA
Percentage Change = ((New Value − Original Value) ÷ Original Value) × 100
A positive result means an increase. A negative result means a decrease.
04

Percentage Difference

Calculate the percentage difference between two values without treating either value as the starting value.

FORMULA
Percentage Difference = |Value 1 − Value 2| ÷ Average of the two values × 100
Average = (Value 1 + Value 2) ÷ 2

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