Question

The price of an article is first decreased by 10 percent and then increased by 20percent. Find the net increase or decrease percent in no.

Answer 1

percentage of article is 100 before decreased
then from question ,10% decreased
100-10=90
then increased 20 % =90+20=110% /answer is
net percentage=110-100=10%
so net increased is 10%

Answer 2

Let the original price of an article = 100.

Given that price of an article is decreased by 10%.

= > 100 - 10% of 100

= > 100 - [(10/100) * 100]

= > 100 - 10

= > 90.

Given that price of an article is increased by 20%.

= > 90 + 20% of 100

= > 90 + [(20/100) * 100]

= > 90 + 20

= > 110

Initially, it was 100 not it is 100. The price is increased.

The net increase = 110 - 100 = 10.

Now,

% increase = (net increase/original number) * 100

= > (10/100) * 100

= > 10%.

Therefore, the net increase  = 10%.

Hope it helps!