Question

A number is increased by 40 % and then
decreased by 40 %. Find the net increase or
decrease per cent.​

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 %

Answer 2

Answer:

Net decrease will be 16 %

Hope it helps

If not dm