Question 1

How do I increase a number by a percentage?

Accepted Answer

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

Question 2

How do I decrease a number by a percentage?

Accepted Answer

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

Question 3

What is a percentage increase used for?

Accepted Answer

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

Percentage Increase/Decrease Calculator

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