Question

10. A number is increased by 40%, then decreased by 40%. Find the net increase or decrease percentage

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Answer 1

Answer:

16% is the right answer.

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Answer 2

Let the number be 100.

Increase in the number=40%=40% of 100

= 40/100 x 100 = 40

∴ increased number =100+40=140

This number is decreased by 40%

∴ decrease in number =40% of 140

= 40/100 x 140
= 5600/100 = 56

∴ new number =140−56=84

Thus, net decreases =100−84=16

Hence, net percentage decrease =
16/100 x 100% = 16%

ANSWER: 16%