20% off 100
20% off 100 is 80. You save 20.
Example answer
80
20% off 100 is 80. You save 20.
Display up to your selected decimal places. Browser arithmetic is used.
See the calculation
100 × 20 ÷ 100 = 20 saved; 100 − 20 = 80 final price
Worked example with the original numbers
How to calculate this answer
Original − (original × discount ÷ 100)
- 100 × 20 ÷ 100 = 20 saved
- 100 − 20 = 80 final price
Check: 80 + 20 = 100
A quick way to check it
A 20% discount saves 20 from 100. Subtracting the saving leaves 80, or 80% of the original price.
What the numbers mean
For an original price of 100 and a 20% discount, the final price before other charges is 80.
A mistake to avoid
The discount amount is the saving, not the final price. This calculation excludes any tax, delivery charge or other adjustment.
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
20% off 100
20% off 100 is 80. You save 20. A 20% discount saves 20 from 100. Subtracting the saving leaves 80, or 80% of the original price.
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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