Question

A computer marked at $Rs.18,000$ was sold at $Rs.15,840$. Find the percentage of discount

Answer 1

Marked price is $Rs.18,000$ and selling price is $Rs.15,480$. Therefore, discount $=Rs.18,000-Rs.15,840=Rs.2,160$. Thus, for a marked price of $Rs.18,000$, discount is $Rs.2,160$.
For a marked price of $Rs.100$, discount $=\frac{2160}{18000}\times 100=12$%. Therefore the percentage of discount is $12$.