Question

Jordan got 27 out of 90 correct in his test. What fraction of the marks did he get wrong? Give your answer in its simplest form.

Answer 1

Answer:

$\dfrac{7}{10}$

Explanation:

It is given that Jordan got 27 out of 90 correct in his test.

Total marks = 90

Correct answers = 27

Incorrect answers = 90 -27 = 63

The fraction of the marks he did wrong.

$\dfrac{\text{Incorrect answers}}{\text{Total marks}}=\dfrac{63}{90}$

Simplify the above expression.

$\dfrac{\text{Incorrect answers}}{\text{Total marks}}=\dfrac{7}{10}$

Therefore, the fraction of the marks he did wrong is 7/10.

Answer 2

90-27=63

therefore the student got 63 questions wrong in a test of 90

i.e 63/90

In its simplest form 7/10