Question

A number is first increased by 20% and then decreased by 15%. Find the increase or decrease in the percentage on whole.​

Answer 1

Step-by-step explanation:

We use the formula : ±x ± y ± xy/100

Where, x = 20

y = -15

Putting the values, we get :

20 - 15 - 300/

5 - 3 = 2%

please mark me as Brainliest

Answer 2

Answer:

suppose the Number is 100 Number increased by 20%

100+20% of 100

100=

100

20

×100

100+20=120

Then,

Resulting number decreased by its 15%

=120−(15% of 120)

=120−(

100

15

×120)

=120−18

=102

Now, net increase =102−100=2

Increase %=

original number

net increases

×100

=

100

2

×100

Increase %=2%