A wrist watch of cost price Rs. 1250 was sold by Sharel for Rs. 1500. What was the profit percent ?

Answer: Option D

Cost price of wrist watch = Rs. 1250
Sale price of wrist watch = Rs. 1500
Profit percent :
$$\begin{array}{rl}& =\left(\frac{1500-1250}{1250}\right)\times 100\\ & =\frac{250}{1250}\times 100\\ & =\frac{25000}{1250}\\ & =20\%\end{array}$$