Question

cp of 10 articles is equal to the sp of 9 articles.find the profit percent?

Answer 1

If cost price of each article=x, then CP of 9 article=9x and CP of 10 article=10x=SP of 9 article.
So profit %=(10x-9x)*100/9x=100/9

hope it helps.

Answer 2

this is the answer.........