Question

A number is increased by 15% and then it is decreased by 20%. Calculate the net increase or
decrease in the value of the number. 8-). decheader
1. A shopkeeper increases the price of a product by 25%. Due to decrease in demand of the product,
he decides to rollback the price back to the original price. Determine the percent decrease in the​

Answer 1

Answer:

Let the required number be 100

Now, according to the question.

The number is first increased by 20 %

⇒ 100 + 20 % of 100

⇒ 100 + [(20*100)/100]

⇒ 100 + 20

⇒ 120

Then, it is decreased by 15 %

⇒ 120 - (15 % of 120)

⇒ 120 - [(15*120)/100]

⇒ 120 - 18

= 102

Net increase = 102 - 100

= 2

Percent increase = (Change in number*100)/100

⇒ (2*100)/100

= 2 %

Hence, the increase percent is 2 %.

Answer.

Step-by-step explanation: