Question

a radio is sold at rs.3120 at a loss of 4%.What will be the gain or loss percent if it issold at rs.3445?

Answer 1

Solution:-
Let the cost price be Rs 'x'.
On selling the radio at Rs. 3120, the loss is 4 %.
So, according to the question
x - (4/100)*x = 3120
24x/25 = 3120
x = (3120*25)/24
x = 78000/24
x = Rs. 3250
S, Cost Price of the radio is Rs. 3250.
Now, if it is sold at Rs. 3445, then the gain = 3445 - 3250
= Rs 195 
Gain percentage = (Profit/CP)*100
= (195/3250)*100
Gain = 6 %
Answer.

Answer 2

selling price = 3120
loss = 4%
original price =x 
so, 
SP = CP - loss
3120= x- 4/100x
3120= x - x/25
3120= 25x - x/25
3120= 24x/25
x= 3250 

gain = original price- selling price
= 3445- 3250
195

gain %= 195 /3250 x 100
= 6%