Question

Oliver spent last night studying for some of

his upcoming tests. He spent 15 minutes
studying science, 20 minutes studying math,
and 10 minutes studying social studies. What
was the ratio of the number of minutes he
spent studying science to the total number
of minutes he spent studying last night?

A: 2 : 9
B: 1 : 3
C: 1 : 2
D: 3 : 4

Answer 1

1:3

Explanation:

Science is 15, total is 45

15: 45 = 1: 3

Answer 2

Add all the times to get total:

15 + 20 + 10 = 45 minutes

He spent 15 on science.

Ratio would be 15:45 which reduces to 1:3

answer is B. 1:3