Question 1

What is reverse percentage?

Accepted Answer

Finding original value before percentage change. If 120 is result after 20% increase, original = 120/1.20 = 100.

Question 2

How do I find the price before tax?

Accepted Answer

Divide total by (1 + tax rate). Price after 8% tax is 108: original = 108/1.08 = 100.

Question 3

How accurate are these calculations?

Accepted Answer

Our calculator uses double-precision floating-point arithmetic, accurate to about 15-16 significant digits for most calculations.

Question 4

Can I use the result in further calculations?

Accepted Answer

Yes, results are calculated to full precision. You can copy the exact value or use the rounded display depending on your needs.

Reverse Percentage Calculator

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