A dealer purchased 250 toys for Rs. 10 each. However, 12 toys were damaged which he had to throw away. He sold the remaining toys at Rs. 12 each. find profit or loss per cent.

No. of toys = 250, Cost of each toy = Rs 10
Total cost price = 250 × 10 = Rs 2500
12 of them were discarded so, only (250-12) = 238 were sold at a rate of Rs 12 per toy.
Total selling price = 238 × 12 = Rs 2856.

Total selling price > Total Cost price

Profit = Total selling price - Total Cost price
Profit = Rs 2856 - Rs 2500 = Rs 356.

$\mathrm{Profit}\%=\frac{\mathrm{Profit}}{\mathrm{Cost} \mathrm{price}}\times 100$

$\mathrm{Profit}\%=\frac{356}{2500}\times 100$

$\mathrm{Profit}\%=14.24\%$