18 Out of 20 as a Percentage
18 out of 20 is 90%. On a test, that is a A−.
- Percentage
- 90%
- Decimal
- 0.9
- Simplest fraction
- 9/10
- Letter grade
- A−
Try another score
18 is 90% of 20
90%
- As a fraction
- 18/20
- Remaining
- 10%
How to work out 18/20 as a percentage
- Divide the part by the whole: 18 ÷ 20 = 0.9.
- Multiply by 100: 0.9 × 100 = 90%.
Shortcut: because 20 × 5 = 100, you can also multiply both numbers by 5. 18 × 5 = 90, so 18/20 = 90/100 = 90%.
Put another way, you missed 2 of 20, which is 10%. Together the two shares always add up to 100%. That is already in the top grade band.
What 18/20 means for a grade
90% is the start of the A range on most US scales, so 18 out of 20 earns an A−. Missing only two questions is a strong result on almost any test.
To reach an A (93%) on a 20-point test you would need 19/20, which is 95%.
Scores near 18 out of 20
| Score | Percentage | Grade |
|---|---|---|
| 20 / 20 | 100% | A+ |
| 19 / 20 | 95% | A |
| 18 / 20 | 90% | A− |
| 17 / 20 | 85% | B |
| 16 / 20 | 80% | B− |
| 15 / 20 | 75% | C |
Other common scores
Questions people ask
What is 18 out of 20 as a percentage?
18 out of 20 is 90%. Divide 18 by 20 to get 0.9, then multiply by 100.
What grade is 18/20?
90% is a A− on the standard US grading scale (90–100 A, 80–89 B, 70–79 C, 60–69 D, below 60 F). Your school's own cutoffs may differ slightly.
What is 18/20 as a fraction in simplest form?
18/20 simplifies to 9/10 by dividing the top and bottom by 2.