How do I calculate reverse percentage?

For an increase: divide the final value by (1 + percentage/100). For a decrease: divide by (1 - percentage/100). Example: If $120 is after a 20% increase, original = 120 / 1.20 = $100.

What was the original price before a 25% discount?

Divide the sale price by (1 - 0.25). If sale price is $75: $75 / 0.75 = $100 original price.

How do I find the value before tax was added?

Divide the total by (1 + tax rate). For $108 with 8% tax: $108 / 1.08 = $100 before tax.

Reverse Percentage Calculator

Find the original value before a percentage increase or decrease. Perfect for finding pre-discount prices and original amounts.

Calculate

Final Value

Percentage (%)

Is Increase? (1=Yes, 0=No)

Formula

Original Value = Final Value / (1 + Percentage/100) or Final Value / (1 - Percentage/100)

Example

final Value:120

percentage:20

original Value:100

Frequently Asked Questions

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Visit our Learning Hub for tutorials and in-depth guides on percentage calculations.

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