Question

Articles are bought at Rs. 45 per dozen and sold at Rs.85 per score. Find the gain or loss per cent .

Answer 1

CP of $12$ articles $=45$

CP of $1$ article $=\frac{45}{12}$Rs.

SP of $20$ articles $=85$

SP of $1$ article $=\frac{85}{20}$

Profit $=SP-CP$

$=\frac{85}{20}-\frac{45}{12}=4.25-3.75$

$=0.5$

Profit $\%=\frac{0.5}{3.75}\times 100=13.34\%$.