Original amount before a 20% increase: final amount 1,200
The original amount was 1,000. A 20% increase adds 200 to give 1,200.
Example answer
1,000
The original amount was 1,000. A 20% increase adds 200 to give 1,200.
Display up to your selected decimal places. Browser arithmetic is used.
See the calculation
1 + 20 ÷ 100 = 1.2; 1,200 ÷ 1.2 = 1,000
Worked example with the original numbers
How to calculate this answer
Final amount ÷ (1 + increase ÷ 100)
- 1 + 20 ÷ 100 = 1.2
- 1,200 ÷ 1.2 = 1,000
Check: 1,000 + (1,000 × 20 ÷ 100) = 1,200
A quick way to check it
After a 20% increase, the final amount is 120% of the original. Divide 1,200 by 1.2 to recover 1,000.
What the numbers mean
If an amount becomes 1,200 after a 20% increase, it started at 1,000 and increased by 200. Subtracting 20% of 1,200 would incorrectly give 960.
A mistake to avoid
Subtracting the increase percentage from the final amount uses the wrong baseline. Divide by the growth factor instead.
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 amount before a 20% increase: final amount 1,200
The original amount was 1,000. A 20% increase adds 200 to give 1,200. After a 20% increase, the final amount is 120% of the original. Divide 1,200 by 1.2 to recover 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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