1. What is Reverse Percentage Calculation?

Reverse percentage calculation is used to find the original value before a percentage increase or decrease was applied. This is useful when you know the final value and the percentage change but need to determine the starting value.

2. How Does the Calculator Work?

The calculator uses the reverse percentage formula:

Where:

• \( O \) — Original value before percentage change
• \( F \) — Final value after percentage change
• \( P \) — Percentage change (positive for increase, negative for decrease)

Explanation: The formula reverses the standard percentage calculation by dividing the final value by (1 + percentage/100).

3. Importance of Reverse Percentage

Details: Reverse percentage is essential in financial calculations, price adjustments, data analysis, and any situation where you need to work backwards from a known result to determine an original value before a percentage change was applied.

4. Using the Calculator

Tips: Enter the final value in any units, and the percentage change (positive for increase, negative for decrease). The calculator will determine the original value before the percentage change was applied.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between percentage and reverse percentage?
A: Standard percentage calculates a new value from an original, while reverse percentage calculates the original from the new value.

Q2: Can this handle percentage decreases?
A: Yes, simply enter a negative percentage value for decreases.

Q3: What if I know the percentage of the original, not the change?
A: This calculator is for when you know the percentage change. For other cases, different formulas apply.

Q4: Why is my result slightly different from manual calculation?
A: The calculator uses precise decimal arithmetic which may differ slightly from rounded manual calculations.

Q5: Can this be used for financial calculations?
A: Yes, it's commonly used for determining pre-tax prices, original investments, or pre-discount prices.