Question

the cp of an article is 5/6th of the s.p what is the percentage profit or loss?

Answer 1

$\frac{sp}{cp} = \frac{100 + r}{100} \\ = \frac{sp}{ \frac{5}{6}sp } = \frac{100 + r}{100} \\ = \frac{6}{5} = \frac{100 + r}{100} \\ = 600 = 500 + 5r \\ = r = 20\%$
20% profit



please follow me

Answer 2

20% profit
let sp is 1
therefore cp is 5/6
and profit is 1-5/6
=1/6
and profit percent =(1/6)/(5/6)×100
=100/5
=20%