Question

3/5 of your class earned an A or a B last week. 1/4 of those teammates earned an A. what fraction of you class earned an A? Possible answers could be 4/9, 7/20, 2/1, 3/20 but which one is it?

Answer 1

3/20

Explanation:

• 3/5 earned an A or B = "3/5 of the class"
• 1/4 of 3/5 earned an A = "3/5 of class divided by 4"

`(3)/(5)` ÷ 4 =
`(3)/(5)`
`* (1)/(4)` =
`(3 * 1)/(5 * 4)` =
`(3)/(20)`