How do I increase a number by a percentage?

Multiply the number by (1 + percentage/100). For example, to increase 200 by 15%: 200 × (1 + 15/100) = 200 × 1.15 = 230.

How do I decrease a number by a percentage?

Multiply the number by (1 - percentage/100). For example, to decrease 200 by 15%: 200 × (1 - 15/100) = 200 × 0.85 = 170.

Percentage increases are commonly used for salary raises, price markups, inflation adjustments, and growth calculations.

Increase or decrease any number by a percentage. Toggle between increase and decrease mode and get instant results.

Original Value

Percentage (%)

Percentage Change Calculator

Find % increase or decrease

Percentage of a Number

Find X% of any number

What Percent is X of Y?

X is what % of Y?

Salary Calculator

Hourly to salary converter & raise calculator