SOLUTION: a:b=9:4 b:c=5:3 (a-b) : (b-c) =??????

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Question 479558: a:b=9:4 b:c=5:3 (a-b) : (b-c) =??????
Answer by Tatiana_Stebko(1539) About Me  (Show Source):
You can put this solution on YOUR website!
a:b=9:4 => a%2Fb=9%2F4 => a=%289%2F4%29b
b:c=5:3 => b%2Fc=5%2F3 => b=%285%2F3%29c
a=%289%2F4%29b=%289%2F4%29%2A%285%2F3%29c=%2815%2F4%29c
(a-b) : (b-c)==25:8