What Is 80% of 30?
Instant answer with step-by-step breakdown.
ANSWER
24
80% × 30 = 24
Result
24.00
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Test Score
80% on a 30-Question Test
Scoring 80% on a 30-question test means getting 24 out of 30 correct (6 wrong). That's a B- on the standard US grading scale. Solid performance.
Grade Scale for 30-Question Test
Each question is worth 3.33 points. Here's how many you need for each grade:
| Grade | Min % | Correct Needed | Can Miss |
|---|---|---|---|
| A+ | 97%+ | 30/30 | 0 |
| A | 93%+ | 28/30 | 2 |
| A- | 90%+ | 27/30 | 3 |
| B+ | 87%+ | 27/30 | 3 |
| B | 83%+ | 25/30 | 5 |
| B- | 80%+ | 24/30 | 6 |
| C+ | 77%+ | 24/30 | 6 |
| C | 73%+ | 22/30 | 8 |
| C- | 70%+ | 21/30 | 9 |
| D+ | 67%+ | 21/30 | 9 |
| D | 63%+ | 19/30 | 11 |
| D- | 60%+ | 18/30 | 12 |
| F | 0%+ | 0/30 | 30 |
What Score Do I Need on the Final?
If your current average is 80%, here's what you'd need on the final exam:
| Target Grade | Final Exam Weight | Score Needed |
|---|---|---|
| 70% (C-) | 20% | 30% |
| 70% (C-) | 30% | 47% |
| 70% (C-) | 40% | 55% |
| 70% (C-) | 50% | 60% |
| 80% (B-) | 20% | 80% |
| 80% (B-) | 30% | 80% |
| 80% (B-) | 40% | 80% |
| 80% (B-) | 50% | 80% |
| 90% (A-) | 50% | 100% |
Formula: Needed = (Target × 100 − Current Score × (100 − Final Weight)) ÷ Final Weight
Pro Tip
If partial credit is available, always attempt every question — even a partial answer is better than blank. For multiple choice, eliminate obviously wrong answers first; statistically, guessing from 2 remaining options gives you 50% odds. Time management matters: skip hard questions and come back to them.
How to Calculate 80% of 30
1
Convert to Decimal
80% ÷ 100 = 0.8000
2
Multiply
30 × 0.8000 = 24
Different Percentages of 30
| Percentage | Result |
|---|---|
| 1% | 0.3 |
| 5% | 1.5 |
| 10% | 3 |
| 15% | 4.5 |
| 20% | 6 |
| 25% | 7.5 |
| 30% | 9 |
| 40% | 12 |
| 50% | 15 |
| 75% | 22.5 |
| 100% | 30 |
Looking for 80% off 30?
See what you'd pay after a 80% discount on $30.Frequently Asked Questions
80% of 30 is 24. Calculated as 30 × 0.8000 = 24.
Divide 80 by 100 to get 0.8000, then multiply by 30. Result: 24.
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