15 Out of 20 – Every Score Out of 20 as a Percentage

Every score out of 20

Score	Wrong	Percent	Letter, 90-80-70-60
20 out of 20	0	100%	A
19 out of 20	1	95%	A
18 out of 20	2	90%	A
17 out of 20	3	85%	B
16 out of 20	4	80%	B
15 out of 20	5	75%	C
14 out of 20	6	70%	C
13 out of 20	7	65%	D
12 out of 20	8	60%	D
11 out of 20	9	55%	F
10 out of 20	10	50%	F
9 out of 20	11	45%	F
8 out of 20	12	40%	F
7 out of 20	13	35%	F
6 out of 20	14	30%	F
5 out of 20	15	25%	F
4 out of 20	16	20%	F
3 out of 20	17	15%	F
2 out of 20	18	10%	F
1 out of 20	19	5%	F
0 out of 20	20	0%	F

The scores for each letter out of 20

Letter	Scores	Wrong
A	18 to 20	0 to 2
B	16 to 17	3 to 4
C	14 to 15	5 to 6
D	12 to 13	7 to 8
F	0 to 11	9 to 20

The 90-80-70-60 scale as one state writes it into law: Florida Statutes, section 1003.437, "Middle and high school grading system" (The 2026 Florida Statutes, read on 6 October 2026 at leg.state.fl.us). It gives each letter a range of whole percents and a grade point value. A school, a district or a teacher may use another scale, and theirs decides the grade.

How it works

Every question on a 20-question test is worth exactly 5 points, so 15 right is 15 × 5 = 75%. On the 90-80-70-60 scale that is a C. All 21 grades out of 20 are in the table further down.

Read the full guide

The quick way to grade out of 20

Multiply the score by 5. That answers what score is 15 out of 20, and it shows that 18 right, 18 × 5 = 90, is the lowest A. Counting the other way, each wrong answer takes 5 off 100: 4 wrong out of 20 leaves 80% and 6 wrong out of 20 leaves 70%.

Questions and answers

What is a 15 out of 20?

75%, a C on the 90-80-70-60 scale, with 5 wrong. As a fraction 15/20 is 3/4, the same share as 75 out of 100. For a 15 out of 20 percentage by hand, 15 ÷ 20 = 0.75.

What is a 14/20 grade?

A 14/20 grade is 70%, the lowest C on this scale. 14/20 simplifies to 7/10. One point less, 13 right, is 65% and a D.

Is 11 out of 20 a passing score?

11 out of 20 is 55%, an F where 60% is the lowest D. Schools set their own pass mark, so check yours. 12 right, 60%, is the first score out of 20 that reaches a D.

What is 8 out of 20, or 4 out of 20?

8 out of 20 is 40% and 4 out of 20 is 20%. As a 7 out of 20 percentage the answer is 35%. All three are an F, as is every score under 12.

What is an 18 out of 20, or 2 wrong out of 20?

18 out of 20 is 90%, an A. The grading scale for 20 questions allows 2 wrong for an A, 4 for a B, 6 for a C and 8 for a D.

15 Out of 20 and Every Score Out of 20