Question

a number first increase by 20% and then decrease by 15%. find the net increase or decrease percent.​

Answer 1

Let the number to be 100

Number Increase by 20%

100 + 20% of 100

= 100 + ( (20/100)×100 )

= 100 + 20 = 120

The resulting number decreased by its 15%

= 120- (15/100×120)

= 120 - 18

= 102

Now, net increase =102-100 = 2

Increase % = (net increase / Original number × 100) %

= ( 2 / 100 ×100 )%

= 2%.

Hence, the increase percent = 2%

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Hope this will help you...

Answer 2

Step-by-step explanation:

Let number =100

20%of 100=20

So

100+20=120

15%of 120=18

So

120-18=102

Total change =102-100=2%