What is 25% of 20?
The answer is 5.
Result Explanation
25% of 20 = 5. If you are subtracting this as a discount, the discounted total is 20 − 5 = 15. If you are allocating, 5 is the allocated amount and 15 is the remainder.
Quick check: 25% is one quarter—compare 20 ÷ 4 with 0.25 × 20; both should equal 5.
How It Works
Step 1: Write 25% as a decimal: 25 ÷ 100 = 0.25.
Step 2: Multiply by the whole: 0.25 × 20 = 5.
Full formula: (25 ÷ 100) × 20 = 5
Quarter shortcut: 20 ÷ 4 = 5. Matching this to the decimal method confirms the result.
Strategy & Insight
For twenty as the base, the quarter shortcut is unusually visible: fives and twenties feel like natural companions in arithmetic. That association helps when you reverse the problem—if you know a quarter is 5, you can rebuild the full 20 by multiplying 5 by 4 without reaching for a percentage key.
When you compare rates side by side on the same £20 basket, absolute savings grow in proportion. Twenty-five percent is neither the smallest nor the largest common discount, but on this base it produces a clear £5 movement, which is easy to weigh against delivery fees, loyalty points, or a competing offer expressed in different terms.
Common Mistakes
- Multiplying 20 by 25 instead of 0.25.
- Stating 15 when the question only asked for the 25% portion.
- Taking 25% of a reduced price while believing the label still referred to the original £20.
- Forgetting that “a quarter” and “25%” are the same operation, then using inconsistent rounding.
Pro Tip
Label your answer when you speak or write it down: “25% of 20 is 5” versus “the price after 25% off is 15.” That one habit prevents the majority of percentage misunderstandings in shops, invoices, and shared expenses.
Examples
Example 1: Sale price groundwork
A £20 shirt with 25% off saves £5. The tagged sale price before other costs would be £15.
Example 2: Commission on a small job
On a £20 gig payment, a 25% platform fee is £5, leaving £15 for the worker before tax or transfer fees.
Example 3: Time blocking
If you carve 25% of a 20-hour project week for admin, that is 5 hours, with 15 hours left for delivery and client work.
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FAQ
What is 25% of 20?
25% of 20 is 5.
How do you calculate 25% of 20 quickly?
Divide 20 by 4, or multiply 20 by 0.25. Both give 5.
What is 20 minus 25%?
Removing the 25% portion (5) from 20 leaves 15.
Why is 25% an easy percentage to work with?
It equals one quarter, so dividing by four is a reliable mental check.