What is 12% of 250?
12% of 250 is 30. Adding it gives 280; taking it off gives 220.
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The numbers for these inputs
| Percent | Of the number | Number plus it | Number minus it |
|---|---|---|---|
| 5% | 12.5 | 262.5 | 237.5 |
| 10% | 25 | 275 | 225 |
| 15% | 37.5 | 287.5 | 212.5 |
| 20% | 50 | 300 | 200 |
| 25% | 62.5 | 312.5 | 187.5 |
| 30% | 75 | 325 | 175 |
| 40% | 100 | 350 | 150 |
| 50% | 125 | 375 | 125 |
How it works
A percent is a part of 100, so X percent of a number is the number x X / 100. For 15 percent of 80: 80 x 15 / 100 = 12.
To add a percent (a price rise, a tip, a tax), multiply by 1 + X/100. To take it off (a discount), multiply by 1 - X/100.
The table shows the same number at common percentages so you can compare at a glance.
Common mistakes
- Adding a percent and then taking the same percent off: +20% then -20% does not return to the start, it leaves you 4% lower.
- Mixing up percent and percentage points: going from 10% to 12% is 2 points, but a 20% increase.
- Taking a percent of the wrong base, for example a discount of the final price instead of the original.
Questions
What is 12 percent of 250?
30. It is 250 x 12 / 100.
What is 250 plus 12 percent?
280.
What is 250 minus 12 percent?
220, for example a 12% discount on a price of 250.
30 is what percent of 250?
12%. Divide the part by the whole and multiply by 100.