
Paul H. answered 01/03/18
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1.5 is the same as 3/2
2.5 is the same as 5/2
Dividing 3/2 by 5/2 is the same as multiplying 3/2 by 2/5
When you multiply, the 2 in the numerator cancels the 2 in the other denominator, so you are left with 3/5.