Delhi Police Constable Exam Model Paper 3

Given,
Cost price of an article is less than selling price by = 20%
Formula:
Profit = SP – CP
Profit % = (Profit/CP) × 100
Calculation:
Let the selling price of the article be Rs. 100
Cost price of the article = 100 × (80/100) = Rs. 80
Profit = Rs. 100 – Rs. $80=\mathit{R}\mathit{s}.20$
∴ Profit $\%=\left(\frac{20}{80}\right)\times 100=25\%$