How to work it out
10 ÷ 15 = 0.6667
0.6667 × 100 = 66.67%
Divide the score by the total, then multiply by 100. 10 out of 15 means you got 10 of 15 right and missed 5, so each question is worth 6.67%.
11 out of 15 (73.33%) would move you up to a C.
Every score out of 15
| Score | Percent | Letter grade |
|---|---|---|
| 15 out of 15 | 100% | A |
| 14 out of 15 | 93.33% | A |
| 13 out of 15 | 86.67% | B |
| 12 out of 15 | 80% | B− |
| 11 out of 15 | 73.33% | C |
| 10 out of 15 | 66.67% | D |
| 9 out of 15 | 60% | D− |
| 8 out of 15 | 53.33% | F |
| 7 out of 15 | 46.67% | F |
| 6 out of 15 | 40% | F |
| 5 out of 15 | 33.33% | F |
| 4 out of 15 | 26.67% | F |
| 3 out of 15 | 20% | F |
| 2 out of 15 | 13.33% | F |
| 1 out of 15 | 6.67% | F |
| 0 out of 15 | 0% | F |
Letter grades use the common US scale (93 and up is an A, 90–92 an A−, and so on, below 60 an F). Your school or teacher may use a different one.