What is 20 decreased by 50%?
10
20 decreased by 50% is 10.
How it is worked out
Multiply by 1 minus the percentage as a decimal.
20 × 0.5 = 10 — a reduction of 10
Try your own numbers
Answer10
Open the full percentage calculator for every other form.
Similar percentage questions
- What is 20 decreased by 40% = 12
- What is 20 decreased by 30% = 14
- What is 20 decreased by 25% = 15
- What is 20 decreased by 20% = 16
- What is 20 decreased by 15% = 17
- What is 20 decreased by 10% = 18
Percentage decrease
Questions
- What is 20 decreased by 50%?
- 20 decreased by 50% is 10. 20 × 0.5 = 10 — a reduction of 10.
- 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.