a number is first increased by 20% and then decreased by 15% . find the net increase or decrease . does it make any difference if it is 15% decreased first and then 20% increased?
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Let the number be 100
increased number =20%of 100
20×100/100= 20
increased number=100+20=120
decreased number=15% of 120
15×120/100=18
number = 120-18
=102
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