Question

Sarah got a 80% on her pre algebra final exam. if there were 75 questions total how many did sarah get correc? How many did she get wrong? what percent did she get wrong?

HELP PLS

Answer 1

Answer: Sarah got 60 questions correct, 15 questions wrong, and she got 20% of the questions wrong.

Explanation:

First, let's solve for how many questions Sarah got correct.

80% as a fraction can be simplified as
`(8)/(10)`. To find how many questions Sarah answered correctly, we can set up a proprtional relationship as follows:

`(8)/(10)=(?)/(75)`

Next, after we cross multiply, 8 X 75 = 600, and 600 ÷ 10 = 60

So, Sarah got 60 out of 75 questions correct.

To find how many she missed, we can simply subtract 60 from 75 to get 15.

So, Sarah got 15 out of 75 questions wrong.

Finally, to find the percentage of the questions that Sarah got wrong, we can use the 15 out of 75 incorrect questions that we found earlier to create a percentage.

15 ÷ 75 = 0.2

0.2 X 100 = 20

So, Sarah got 20% of the questions wrong.

Answer 2

She got 60 correct and 15 wrong. She got 11.25% wrong