How to work it out
21 ÷ 50 = 0.42
0.42 × 100 = 42%
Divide the score by the total, then multiply by 100. 21 out of 50 means you got 21 of 50 right and missed 29, so each question is worth 2%.
30 out of 50 (60%) would move you up to a D−.
Every score out of 50
| Score | Percent | Letter grade |
|---|---|---|
| 50 out of 50 | 100% | A |
| 49 out of 50 | 98% | A |
| 48 out of 50 | 96% | A |
| 47 out of 50 | 94% | A |
| 46 out of 50 | 92% | A− |
| 45 out of 50 | 90% | A− |
| 44 out of 50 | 88% | B+ |
| 43 out of 50 | 86% | B |
| 42 out of 50 | 84% | B |
| 41 out of 50 | 82% | B− |
| 40 out of 50 | 80% | B− |
| 39 out of 50 | 78% | C+ |
| 38 out of 50 | 76% | C |
| 37 out of 50 | 74% | C |
| 36 out of 50 | 72% | C− |
| 35 out of 50 | 70% | C− |
| 34 out of 50 | 68% | D+ |
| 33 out of 50 | 66% | D |
| 32 out of 50 | 64% | D |
| 31 out of 50 | 62% | D− |
| 30 out of 50 | 60% | D− |
| 29 out of 50 | 58% | F |
| 28 out of 50 | 56% | F |
| 27 out of 50 | 54% | F |
| 26 out of 50 | 52% | F |
| 25 out of 50 | 50% | F |
| 24 out of 50 | 48% | F |
| 23 out of 50 | 46% | F |
| 22 out of 50 | 44% | F |
| 21 out of 50 | 42% | F |
| 20 out of 50 | 40% | F |
| 19 out of 50 | 38% | F |
| 18 out of 50 | 36% | F |
| 17 out of 50 | 34% | F |
| 16 out of 50 | 32% | F |
| 15 out of 50 | 30% | F |
| 14 out of 50 | 28% | F |
| 13 out of 50 | 26% | F |
| 12 out of 50 | 24% | F |
| 11 out of 50 | 22% | F |
| 10 out of 50 | 20% | F |
| 9 out of 50 | 18% | F |
| 8 out of 50 | 16% | F |
| 7 out of 50 | 14% | F |
| 6 out of 50 | 12% | F |
| 5 out of 50 | 10% | F |
| 4 out of 50 | 8% | F |
| 3 out of 50 | 6% | F |
| 2 out of 50 | 4% | F |
| 1 out of 50 | 2% | F |
| 0 out of 50 | 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.