How to work out 39 out of 40
Divide the score by the total and multiply by 100: 39 ÷ 40 = 0.975, and 0.975 × 100 = 97.5%.
That means 1 answer was wrong, and each question was worth 2.5% of the total. One more correct answer (40/40) would be 100%.
Grading chart for 40 questions
| Wrong | Score | Percent | Grade |
|---|---|---|---|
| 0 | 40/40 | 100% | A+ |
| 1 | 39/40 | 97.5% | A+ |
| 2 | 38/40 | 95% | A |
| 3 | 37/40 | 92.5% | A− |
| 4 | 36/40 | 90% | A− |
| 5 | 35/40 | 87.5% | B+ |
| 6 | 34/40 | 85% | B |
| 7 | 33/40 | 82.5% | B− |
| 8 | 32/40 | 80% | B− |
| 9 | 31/40 | 77.5% | C+ |
| 10 | 30/40 | 75% | C |
| 11 | 29/40 | 72.5% | C− |
| 12 | 28/40 | 70% | C− |
| 13 | 27/40 | 67.5% | D+ |
| 14 | 26/40 | 65% | D |
| 15 | 25/40 | 62.5% | D− |
| 16 | 24/40 | 60% | D− |
| 17 | 23/40 | 57.5% | F |
| 18 | 22/40 | 55% | F |
| 19 | 21/40 | 52.5% | F |
| 20 | 20/40 | 50% | F |
| 21 | 19/40 | 47.5% | F |
| 22 | 18/40 | 45% | F |
| 23 | 17/40 | 42.5% | F |
| 24 | 16/40 | 40% | F |
| 25 | 15/40 | 37.5% | F |
| 26 | 14/40 | 35% | F |
| 27 | 13/40 | 32.5% | F |
| 28 | 12/40 | 30% | F |
| 29 | 11/40 | 27.5% | F |
| 30 | 10/40 | 25% | F |
| 31 | 9/40 | 22.5% | F |
| 32 | 8/40 | 20% | F |
| 33 | 7/40 | 17.5% | F |
| 34 | 6/40 | 15% | F |
| 35 | 5/40 | 12.5% | F |
| 36 | 4/40 | 10% | F |
| 37 | 3/40 | 7.5% | F |
| 38 | 2/40 | 5% | F |
| 39 | 1/40 | 2.5% | F |
| 40 | 0/40 | 0% | F |
Letter grades use the common US scale (A ≥ 93%, B ≥ 83%, C ≥ 73%, D ≥ 63%, with ± bands). Your school may use different cut-offs.