Which pair of ratios form a proportion? 97 points

5 : 10 and 10 : 15

8 : 12 and 18 : 27

9 : 15 and 24 : 30

6 : 20 and 7 : 30

8 : 12 and 18 : 27

Step-by-step explanation:

5 : 10 and 10 : 15

Divide each by 5

1:2  and 2:3  The ratios are not the same

8 : 12 and 18 : 27

Divide the first by 4   and the second by 9

2:3  and 2:3  This is a proportion

9 : 15 and 24 : 30

Divide the first by 3 and the second by 6

3:5 and 4:5  The ratios are not the same

6 : 20 and 7 : 30

Divide the first by 2 and leave the second alone

2:10 and 7: 30  The ratios are not the same

B. 8 : 12 and 18 : 27

Step-by-step explanation:

8 : 12

Reduces to

2 : 3

18 : 27

Reduces to

2 : 3

Same simplified ratio, hence proportional

step-by-step explanation:

it's 15