Question

If 1/20 of the student body were born in a country other than the United States, and of those students, 4/7 were born in Puerto Rico, what portion of the student body were born in Puerto Rico?

Answer 1

1/35

Explanation:

Number of students born in a country other than the United States = 1/20

Also, 4/7 of 1/20 were born in Puerto Rico

Portion of the student body born in Puerto Rico is therefore = 4/7 of 1/20

4/7 x 1/20

Multiply through

4/140

1/35