Question

A number is increase by 40% and decreased by 40%. Find the net increase and decrease percent.​

Answer 1

Let us assume that the number be 100. At first we have to increase the number by 40%. Then we have to decrease 40% again.

so, firstly, after increase the term by 40% , we have the number be

100 + 100*40/100

= 100 + 40

= 140

Again, we have to decrease the number by 40%. So, the number becomes

140 - 140*40/100

= 140 - 56

= 84

So, we have seen that the number decrease. Now we have to calculate the percentage of the number has decreased.

Assumed number = 100

Present number = 84

So, decrease percentage = 16 % (ans.)

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Answer 2

Answer:

Step-by-step explanation:

Let us assume that the number is 100

Step-by-step explanation:

Increased by 40% of number = 100+40=140

Now decrease by 40% of obtained number

= 140-56=84

Now see the difference

= 100-84=16

Therefore there is decrease by 16%