21 out of 30 = 70.00%
If you scored 21 points out of a possible 30 points, your percentage grade is 70.00%, which is a C- letter grade with a GPA of 1.7.
Standard US Scale
4.0 Scale
Grade Description
Satisfactory - Meets basic requirements with some gaps in understanding.
Improvement Tips
- Identify and focus on your weaker areas
- Increase study time and create a regular schedule
- Seek help from teachers or tutors for difficult concepts
- Use multiple learning resources (videos, books, practice tests)
Detailed Grade Table
| Grade | Correct | Incorrect | Percent |
|---|---|---|---|
| A+ | 30 to 30 | 0 to 0 | 97.00 to 100.00 |
| A | 28 to 29 | 1 to 2 | 93.00 to 96.99 |
| A- | 27 to 27 | 3 to 3 | 90.00 to 92.99 |
| B+ | 27 to 26 | 4 to 3 | 87.00 to 89.99 |
| B | 25 to 26 | 4 to 5 | 83.00 to 86.99 |
| B- | 24 to 24 | 6 to 6 | 80.00 to 82.99 |
| C+ | 24 to 23 | 7 to 6 | 77.00 to 79.99 |
| C | 22 to 23 | 7 to 8 | 73.00 to 76.99 |
| C- | 21 to 21 | 9 to 9 | 70.00 to 72.99 |
| D+ | 21 to 20 | 10 to 9 | 67.00 to 69.99 |
| D | 19 to 20 | 10 to 11 | 63.00 to 66.99 |
| D- | 18 to 18 | 12 to 12 | 60.00 to 62.99 |
| F | 0 to 17 | 13 to 30 | 0.00 to 59.99 |
Your grade of 70.00% (C-) is highlighted in the table above. The "Correct" and "Incorrect" columns show the equivalent number of questions for your total of 30 points.
To calculate 21 out of 30 as a percentage, you divide 21 by 30 and then multiply by 100:
This calculation gives you your percentage score, which can then be converted to a letter grade based on your school or institution's grading scale.
Step-by-step explanation:
- Divide the points earned (21) by the total points possible (30):
21 ÷ 30 = 0.7000 - Multiply the result by 100 to get the percentage:
0.7000 × 100 = 70.00% - Convert the percentage to a letter grade using the standard scale:
70.00% = C-
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A score of 21 out of 30 (70.00%) has different implications depending on the educational context:
| Context | Interpretation |
|---|---|
| Homework Assignment | Adequate understanding with some gaps |
| Quiz or Test | Good preparation with some knowledge gaps |
| Final Exam | Solid understanding of core concepts |
| Course Grade | Satisfactory performance with room for improvement |
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