Question

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

Answer 1

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