Question

A vendor bought $20$ oranges for $Rs.125$ and sold them at $Rs.90$ per dozen. Find his gain or loss percent to the nearest integer.

Answer 1

CP of $20$ oranges $=Rs.125$

$\therefore$ CP of $1$ orange $=Rs.\frac{125}{20}=Rs.6.25$

SP of $12$ oranges $=Rs.90$

$\therefore$ Sp of $1$ orange $=Rs.\frac{90}{12}=Rs.7.5$

Profit $=$ SP-CP $=Rs.7.5-Rs.6.25=Rs.1.25$

$\therefore Profit\%=\frac{1.25}{6.25}\times 100=20\%$