What is 8% of 300?
8% of 300 is 24. Adding it gives 324; taking it off gives 276.
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The numbers for these inputs
| Percent | Of the number | Number plus it | Number minus it |
|---|---|---|---|
| 5% | 15 | 315 | 285 |
| 10% | 30 | 330 | 270 |
| 15% | 45 | 345 | 255 |
| 20% | 60 | 360 | 240 |
| 25% | 75 | 375 | 225 |
| 30% | 90 | 390 | 210 |
| 40% | 120 | 420 | 180 |
| 50% | 150 | 450 | 150 |
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 8 percent of 300?
24. It is 300 x 8 / 100.
What is 300 plus 8 percent?
324.
What is 300 minus 8 percent?
276, for example a 8% discount on a price of 300.
24 is what percent of 300?
8%. Divide the part by the whole and multiply by 100.