Original price before a 20% discount: final price 800
The original price was 1,000. A 20% discount saves 200 and leaves 800.
Example answer
1,000
The original price was 1,000. A 20% discount saves 200 and leaves 800.
Display up to your selected decimal places. Browser arithmetic is used.
See the calculation
1 − 20 ÷ 100 = 0.8; 800 ÷ 0.8 = 1,000
Worked example with the original numbers
How to calculate this answer
Final price ÷ (1 − discount ÷ 100)
- 1 − 20 ÷ 100 = 0.8
- 800 ÷ 0.8 = 1,000
Check: 1,000 − (1,000 × 20 ÷ 100) = 800
A quick way to check it
After a 20% discount, 80% of the original remains. Divide 800 by 0.8 to recover the original price of 1,000.
What the numbers mean
A final price of 800 after exactly 20% off corresponds to an original price of 1,000. The saving was 200; adding 20% to 800 would incorrectly give 960.
A mistake to avoid
Adding the discount percentage to the final price uses the wrong baseline. A 100% discount cannot identify a unique original price.
Related calculations to try
Use the percentage calculator for a different type of question, apply one percentage to a list, or compare several percentage rates.
Questions about this example
Original price before a 20% discount: final price 800
The original price was 1,000. A 20% discount saves 200 and leaves 800. After a 20% discount, 80% of the original remains. Divide 800 by 0.8 to recover the original price of 1,000.
Can I change the numbers?
Yes. Edit the two inputs to see a new answer, or use Calculate. Reset example restores this page’s starting numbers. The worked explanation below the calculator continues to describe the original example.
Why might another answer look slightly different?
Decimal settings affect display rounding. A ≈ sign marks a rounded result, and very small values may round to zero. This tool uses ordinary browser arithmetic rather than exact decimal arithmetic. Check the formula and baseline before comparing results.
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