How to Calculate 21 out of 31 as a Percentage
Divide the numerator by the denominator, then multiply by 100. The result is the percentage score.
Step by step: 21 divided by 31 equals 0.6774 as a decimal. Multiply that by 100 and you get 67.7%. On the standard US plus/minus grading scale, 67.7% is a D+ grade, equal to 1.3 GPA on the 4.0 scale.
What 67.7% Means as a D+ Grade
Below average. A 1.3 GPA is typically below the 2.0 academic good-standing threshold. Most schools require a 2.0 cumulative GPA to remain in good standing.
At most US colleges and high schools, the minimum passing score is 60%. A score of 67.7% clears that threshold, so 21 out of 31 is a passing grade. Always verify with your institution, as some programs require a C or higher (70%) for courses that count toward major requirements.
Nearby Grade Percentages
The five fractions below have the closest percentage values to 21/31. Each links to its own grade breakdown.
| Fraction | Percentage | Letter grade | GPA (4.0) |
|---|---|---|---|
| 23 out of 34 | 67.6% | D+ | 1.3 |
| 19 out of 28 | 67.9% | D+ | 1.3 |
| 27 out of 40 | 67.5% | D+ | 1.3 |
| 54 out of 80 | 67.5% | D+ | 1.3 |
| 17 out of 25 | 68.0% | D+ | 1.3 |
Use the grade percentage reference for the complete letter-grade scale, percentage ranges, GPA values, and conversion formula. To convert any score directly, try the test grade calculator.