What is 20 decreased by 10%?
18
20 decreased by 10% is 18.
How it is worked out
Multiply by 1 minus the percentage as a decimal.
20 × 0.9 = 18 — a reduction of 2
Try your own numbers
Answer18
Open the full percentage calculator for every other form.
Similar percentage questions
- What is 20 decreased by 5% = 19
- What is 20 decreased by 15% = 17
- What is 20 decreased by 20% = 16
- What is 20 decreased by 25% = 15
- What is 20 decreased by 30% = 14
- What is 20 decreased by 40% = 12
Percentage decrease
Questions
- What is 20 decreased by 10%?
- 20 decreased by 10% is 18. 20 × 0.9 = 18 — a reduction of 2.
- How do you work this out?
- Multiply by 1 minus the percentage as a decimal.
- Can I use other numbers?
- Yes — the calculator on this page takes any two numbers, and the full percentage calculator covers every form: percentage of a number, one number as a percentage of another, percentage change, increase and decrease.