The price of a certain painting increased by 20% during the first year and decreased by 15% during the second year. the price of the painting at the end of the 2-year period was what percent of the original price?
a. 102%b. 105%c. 120%d. 135%e. 140%

A.102%

Step-by-step explanation:

Let cost price of painting=$100

In first year price increased 20%

Then , the price=$120

In second year

Price decreased 15%

Then , the price of painting=

The price of painting=$102

Percent =

By using this formula

Then, we get

Percent of the original price=

Percent of the original price=102%

Option A is true.

a negative exponent is translated as follows:

so, we have