Question

due to increase of 30% in price of colour TV the sale is reduced to 40% then what will be the percentage of change of income

Answer 1

let original sale be Rs. 100
sale when it decreased by 40% 100-40-60
Sale of Rs. 60 with increase of 30%=78
This is (100-78)=22 less than the original sale
so decrease in sale is 22%

Answer 2

Answer:

The loss percentage is 22%.

Step-by-step explanation:

Given : Due to increase of 30% in price of colour TV the sale is reduced to 40%.

To find : What will be the percentage of change of income ?

Solution :

Let us take the original price be 100.

Increase of 30% in price of colour TV,

i.e. $100+30\%\times 100$

$=100+\frac{30}{100}\times 100$

$=100+30$

$=130$

Then it is reduced to 40%,

i.e. $130-40\%\times 130$

$=130-\frac{40}{100}\times 130$

$=130-52$

$=78$

So, The cost price is Rs.100.

The selling price is Rs.78.

As CP>SP there is a loss.

Loss = CP-SP

Loss = 100-78

Loss = Rs.22

Loss percentage is given by,

$L\%=\frac{L}{CP}\times 100$

$L\%=\frac{22}{100}\times 100$

$L\%=22\%$

Therefore, The loss percentage is 22%.