a no. is decreased by 25/2% and then increased by 50/7% then the net change in no. is.?
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the formula to derive net change is A + B + (A*B)/100
so, -25/2 + 50/7 - 25*50/100*2*7
-25/2 + 50/7 - 50/56 = (-700+400-50) / 56 = -350 / 56 = -6.25% decrease is the net change
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