Question

If the cost price of $11$ shirts is equal to the selling price of $10$ shirts, find the percentage profit or loss.

Answer 1

$11\left(CP\right)=10\left(SP\right)$

Profit/loss =$\frac{SP-CP}{CP}\times 100=\frac{\frac{11CP}{10}-CP}{CP}\times 100$

$=10$% profit