Question

The price of CD is twice that of Cassette. The price of CD is increased by
20% and that of Cassette is decreased by 25%. Find the percent change in
the sum of the prices of the two. *

Answer 1

Answer:change in price is -10%

Step-by-step explanation:

Let, price of Cd is x and price of Cassette is 2x

So, Total sum of price is 3x

After changing of price,

Price of Cd is 1.2x and price of Cassette is (7.5)×2x= 1.5x

Now,total sum of price is 2.7x

Total changed price is -0.3x

Total change in price is (-0.3x÷3x)×100% = -10%