Answers

2014-03-24T17:23:58+05:30
90percent of A =90/100*A =9/10A
30percent of B = 30/100*B = 3/10*B
therefore, 9/10*A=3/10*B
               9/10*10/3*A=B
               3A=B

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2014-03-24T20:02:13+05:30
90% of A = 30% of B
90/100*A=30/100*B
9*A=3*B
3A=B
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