SOLUTION: If a:b=9:4, and b:c=5:3, then (a-b) : (b-c) is equal to A. 7:12 B. 25:8 C. 4:1 D. 5:2 E. this cannot be determined

Algebra ->  Percentage-and-ratio-word-problems -> SOLUTION: If a:b=9:4, and b:c=5:3, then (a-b) : (b-c) is equal to A. 7:12 B. 25:8 C. 4:1 D. 5:2 E. this cannot be determined       Log On


   

Question 298709: If a:b=9:4, and b:c=5:3, then (a-b) : (b-c) is equal to
A. 7:12 B. 25:8 C. 4:1 D. 5:2 E. this cannot be determined
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
If a:b=9:4, and b:c=5:3, then (a-b) : (b-c) is equal to ?
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Let a = 9x, then b = 4x
Let b = 5x, then c = 3x
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Then a-b = 5x and b-c = 2x
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So (a-b):(b-c) = 5x/2x = 5:2
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Cheers,
Stan H.
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A. 7:12 B. 25:8 C. 4:1 D. 5:2 E. this cannot be determined