How to Calculate 18 out of 28 as a Percentage
Divide the numerator by the denominator, then multiply by 100. The result is the percentage score.
Step by step: 18 divided by 28 equals 0.6429 as a decimal. Multiply that by 100 and you get 64.3%. On the standard US plus/minus grading scale, 64.3% is a D grade, equal to 1.0 GPA on the 4.0 scale.
What 64.3% Means as a D Grade
Below average. A 1.0 GPA triggers academic probation review at virtually every US institution. Many programs require a C or higher to count a course toward major requirements.
At most US colleges and high schools, the minimum passing score is 60%. A score of 64.3% clears that threshold, so 18 out of 28 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 18/28. Each links to its own grade breakdown.
| Fraction | Percentage | Letter grade | GPA (4.0) |
|---|---|---|---|
| 9 out of 14 | 64.3% | D | 1.0 |
| 27 out of 42 | 64.3% | D | 1.0 |
| 45 out of 70 | 64.3% | D | 1.0 |
| 29 out of 45 | 64.4% | D | 1.0 |
| 20 out of 31 | 64.5% | D | 1.0 |
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.