What is 20% of 120?
The answer is 24.
Result Explanation
20% of 120 = 24. Because 20% is one fifth, you can also do 120 ÷ 5 = 24. If you mean 20% off 120, then 24 is the discount and the new total is 96 (use the discount calculator for before/after).
If you’re comparing two values (not taking a slice of one number), use the percentage change calculator. For reverse problems like “120 is 20% of what?”, use the reverse percentage calculator.
Why Twenty-Four on One-Twenty
One-twenty is 12 × 10 (or 10 × 12 if you think in dozens). Twenty percent removes one factor of five from the product view 120 ÷ 5 = 24, which stays a whole number because 120 is divisible by both 10 and 12 in familiar ways.
Against 20% of 75 (15): adding forty-five to the base adds nine to the fifth, and 15 + 9 = 24—the same +1-per-+5 rhythm you see stepping up the tens through ninety, one hundred, one-ten, and one-twenty at this rate.
Mental Maths Shortcuts for 20% of 120
Fastest: 120 ÷ 5 = 24.
- 10% of 120 = 12; double → 20% = 24.
- 20% of 100 = 20; add 20% of 20 = 4 → 24.
From 25% of 120 = 30, subtract 5% of 120 = 6 to land on twenty-four—useful if quarters come first mentally.
Real-World Examples
Example 1: Twenty percent off a £120 fee
The markdown is £24 and you pay £96 if nothing else stacks.
Example 2: One-twenty-unit batch
If a 20% quality hold applies, 24 units are ring-fenced and 96 are free to ship under a strict rule.
Example 3: Budget line
Allocating 20% of a £120 sub-budget means £24 for that line and £96 notionally elsewhere—not the other way round unless the wording says “after discount.”
Example 4: Tenfold check
20% of 1200 is 240. If you see 24 or 2400 on the scaled row, revisit the percent-to-decimal step.
Common Mistakes
- Answering £96 when asked only for twenty percent of £120—ninety-six is after the discount.
- Multiplying 20 × 120 without dividing by a hundred → 2400.
- Confusing 20% of 120 with “120 is 20% of what?” (120 ÷ 0.2 = 600).
- Using 120 ÷ 20 as a percentage trick—it is not the fifth.
- Treating 0.2% of one-twenty as twenty percent.
Related Links
FAQ
What is 20% of 120?
20% of 120 is 24.
How do you calculate 20% of 120?
Multiply 120 by 0.2, divide 120 by 5, or double 10% of 120 (12 → 24).
What is 20% off 120?
20% off 120 is a reduction of 24, leaving 96.