Question

You take a test with 25 questions. Your grade on the test was a 80%. How many questions did you get right?

Answer 1

20 questions

Explanation:

1.) Use the following equation:

`(x)/(y)` =
`(p)/(100)`

2.) For this equation,

• x is the # of test question you got right
• y is the total # of test questions
• p is the grade you got on the test

3.) Substitute

`(x)/(25)` =
`(80)/(100)`

4.) Solve

`(x)/(25)` =
`(80)/(100)`

`(x)/(25)` =
`(8)/(10)`

`(x)/(25)` =
`(4)/(5)`

5.) Cross Multiply

`(x)/(25)` =
`(4)/(5)`

5x = 100

6.) Divide

5x = 100

x = 20

Therefore, you got 20 questions right.

Answer 2

Answer: 20 questions
Explanation: 25 divided by 20 = 80%