By what per cent must the cost price be raised in fixing the sale price in order that there may be a profit of 20% after allowing a commission of 10%?
Q. By what per cent must the cost price be raised in fixing the sale price in order that there may be a profit of 20% after allowing a commission of 10%?
Answer: $latex 33 \frac{1}{3}&s=1$
Notes: Let the CP = 100 Rs. Then, SP = 120 Rs. Let the marked price = x Rs. Then, 90% of x = 120 Rs. $latex => x = \frac{120\times 100}{90}&s=1$ $latex = \frac{400}{3} = 133\frac{1}{3}\%&s=1$ Hence, the marked price is $latex 33\frac{1}{3}\%&s=1$ above the cost price.