15 out of 21 as a percentage
15 / 21 x 100 = 71.4%
Letter grades here use the standard 10-point scale (A 90+, B 80+, C 70+, D 60+, F below 60). Your school's scale may differ — check your syllabus, or use the Test Grade Calculator where the scale is configurable.
How to Calculate 15 out of 21 as a Percentage
Divide the numerator by the denominator, then multiply by 100. Using the real numbers:
percent = (X / Y) x 100
percent = (15 / 21) x 100
percent = 0.7143 x 100 = 71.4%
On the standard 10-point letter-grade scale, 71.4% maps to a letter grade of C, which carries a GPA value of 2.0.
Is 15 out of 21 a Good Score?
71.4% is an average, passing score. 15 out of 21 meets the baseline for most courses — you have demonstrated acceptable knowledge of the material. A C means you are passing, though further review of weaker areas could meaningfully raise your grade next time.
Score Reference Table — Out of 21
All 22 possible scores on a 21-point assessment, with percentages and letter grades. Your score is highlighted.
| Score | Percentage | Letter |
|---|---|---|
| 21/21 | 100% | A |
| 20/21 | 95.2% | A |
| 19/21 | 90.5% | A |
| 18/21 | 85.7% | B |
| 17/21 | 81% | B |
| 16/21 | 76.2% | C |
| 15/21 | 71.4% | C |
| 14/21 | 66.7% | D |
| 13/21 | 61.9% | D |
| 12/21 | 57.1% | F |
| 11/21 | 52.4% | F |
| 10/21 | 47.6% | F |
| 9/21 | 42.9% | F |
| 8/21 | 38.1% | F |
| 7/21 | 33.3% | F |
| 6/21 | 28.6% | F |
| 5/21 | 23.8% | F |
| 4/21 | 19% | F |
| 3/21 | 14.3% | F |
| 2/21 | 9.5% | F |
| 1/21 | 4.8% | F |
| 0/21 | 0% | F |
Letter Grade Breakdown
- A — 90% and above (4.0 GPA)
- B — 80%–89.9% (3.0 GPA)
- C — 70%–79.9% (2.0 GPA)
- D — 60%–69.9% (1.0 GPA)
- F — below 60% (0.0 GPA)
Grade a Test with These Numbers
If you answered 15 out of 21 questions correctly, your score is 71.4% — a letter grade of C. You got 6 questions wrong.
Use the Test Grade Calculator (pre-filled for 21 questions, 6 wrong) for a full grading-scale table. Or convert any percentage with the Percent to Letter Grade converter.
Frequently Asked Questions
What is 15 out of 21 as a percentage?
15 out of 21 as a percentage is 71.4%. The formula is (15 divided by 21) times 100 = 71.4%. On the standard 10-point grading scale that is a C (2.0 GPA).
Is 15 out of 21 a passing grade?
Yes — 71.4% (15/21) is a passing score on the standard 10-point scale. It earns a letter grade of C. Most courses require at least 60% (a D) to pass, though some programs require a C (70%) or higher for credit toward your major.
How many questions did I get wrong if I scored 15 out of 21?
You got 6 questions wrong out of 21. That is 28.6% incorrect, leaving you with a score of 71.4% (C).
Nearby Scores — Out of 21
- 14 out of 21 = 66.7% (D)
- 15 out of 21 = 71.4% (C) — current
- 16 out of 21 = 76.2% (C)