Which ratio is porportional to 18/21? A. 2/3 B. 30/35 C. 36/48 D. 1/3

You can solve this problem by applying the proccedure below:

You have:

a) 18/21=2/3

18x3/21x2

36≠42 (2/3 is not proportinal to 18/21).

b) 18/21=30/35

18x35/21x30

630=630 (30/35 is proportional to 18/21)

c) 18/21=36/48

18x48/21x36

864≠756 (36/48 is not proportinal to 18/21)

d) 18/21=1/3

18x3/21x1

54≠21 (1/3 is not proportinal to 18/21)

Therefore, you can conclude that the correct option is: B. 30/35