Percentage Increase/Decrease Quick Reference

Percentage increase and decrease formulas side by side.

Brekzy Team Published September 8, 2026

Percentage increase and decrease formulas side by side. For worked examples, see How to Calculate Percentage Increase and How to Calculate Percentage Decrease.

Increase % = ((New − Original) ÷ Original) × 100
Decrease % = ((Original − New) ÷ Original) × 100

Use the Percentage Increase and Decrease Calculators

Try it yourself

Percentage Increase Calculator

Can a percentage increase be more than 100%?

Yes, if the new value is more than double the original.

Can a percentage decrease be more than 100%?

For values that can’t go negative (like price or weight), no, it maxes out at 100% when the new value is zero.

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