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When the price of a portable hard disk is reduced by 24%, its sale increases by 35%. What is the net percentage change in the total revenue?
Question

When the price of a portable hard disk is reduced by 24%, its sale increases by 35%. What is the net percentage change in the total revenue?

A.

6.2% increase

B.

2.6% increase

C.

6.2% decrease

D.

2.6% decrease

Correct option is B

Given:

Price decreased by 24%

Sales increased by 35% 

Formula Used:

Use the net percentage change formula for successive changes:

Net % Change = x+y+xy100 x + y + \frac{xy}{100}​​

Solution: 

x = -24, y = +35

Net % Change = 24+35+(24)(35)100-24 + 35 + \frac{(-24)(35)}{100}​​

= 11 - 840100 \frac{840}{100}​​

= 11 - 8.4 = 2.6%

Thus, 2.6% increase in total revenue.

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