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2014-04-24T19:52:55+05:30
A:b=4:5

=> a/b =4/5
b=5a/4

Now  b/c=15/16
=> b=15c/16

=>5a/4=15c/16

=>a/c=3/4

=>a:c=3:4

3 3 3
explained really properly
Thankyou...
2014-04-24T19:52:56+05:30
A/b=n1/d1 b/c=n2/d2    
a:b=n1n2:d1d2
4*15:5*16
3:4

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