What is 20% of 500?
The answer is 100.
Why One Hundred on Five Hundred
Five hundred is 50 × 10, so 10% = 50 and doubling lands on 100 on the nose.
The base is exactly 5 × 100. Since 20% of 100 is 20, five copies line up as 20 × 5 = 100—an easy structural check for any total built from hundreds.
Mental Maths Shortcuts for 20% of 500
Fastest: 500 ÷ 5 = 100.
- 10% of 500 = 50; double → 20% = 100.
- 20% of 400 = 80; add 20% of 100 = 20 → 100.
From 25% of 500 = 125, subtract 5% of 500 = 25 to land on one hundred—useful if quarters come first mentally.
Real-World Examples
Example 1: Twenty percent off a £500 fee
The markdown is £100 and you pay £400 if nothing else stacks.
Example 2: Five-hundred-unit batch
If a 20% quality hold applies, 100 units are ring-fenced and 400 are free to ship under a strict rule.
Example 3: Budget line
Allocating 20% of a £500 sub-budget means £100 for that line and £400 notionally elsewhere—not the other way round unless the wording says “after discount.”
Example 4: Tenfold check
20% of 5000 is 1000. If you see 100 or 10000 on the scaled row, revisit the percent-to-decimal step.
Common Mistakes
- Answering £400 when asked only for twenty percent of £500—four hundred is after the discount.
- Multiplying 20 × 500 without dividing by a hundred → 10000.
- Confusing 20% of 500 with “500 is 20% of what?” (500 ÷ 0.2 = 2500).
- Using 500 ÷ 20 as a percentage trick—it is not the fifth.
- Treating 0.2% of five hundred as twenty percent.
Related Links
FAQ
What is 20% of 500?
20% of 500 is 100.
How do you calculate 20% of 500?
Multiply 500 by 0.2, divide 500 by 5, or double 10% of 500 (50 → 100).
What is 20% off 500?
20% off 500 is a reduction of 100, leaving 400.