The answer is: 45 .
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3/5 * 75 = 3/5 * 75/1 ;
The "5" cancels to a "1"; and the "75" cancels to a "15" ;
since "75÷5 = 15" ; and since "5÷5 =1" .
So, rewrite the problem:
3/1 = 15/1 = 45/1 = 45.
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Other method:
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3/5 * 75 = 6/10 * 75 = 0.6 * 75 = 45.0 = 45 .
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