What This Calculator Does
This reverse percentage calculator helps you find the original number when you only know a percentage and a resulting value. It’s the “work backwards” version of a percent-of-number calculation.
Use it to solve problems like “30 is 20% of what?” or to find an original price before a discount or increase.
When Would You Use This Calculator?
- Finding the total when you know a part and its percentage
- Calculating the original price before a percentage discount
- Calculating the original value before a percentage increase
- Reversing commissions, taxes, or percentage-based adjustments
- Checking percentage math for bills, invoices, or reports
Common Questions This Calculator Can Answer
- 30 is 20% of what number?
- If the final price is 80 after a 20% discount, what was the original price?
- If a value increased 15% and is now 230, what was it before?
- How do I reverse a percentage calculation?
- What is the reverse percentage formula?
Related Calculators
- Percent of a Number Calculator
- What Is X% of Y Calculator
- Reverse Percentage Calculator
- Percentage Change Calculator
- Percentage Increase Calculator
- Percentage Decrease Calculator
- Percentage Difference Calculator
- Percentage to Decimal Calculator
- Decimal to Percentage Calculator
- Fraction to Percentage Calculator