Question

the cost of 10 articles is equal to the selling price of 9 articles. Find the profit percent.​

Answer 1

 

$\huge \pink{\boxed{\mathbf{Answer}}}$

Let us Consider,

• CP of 1 article be x.

• CP of 10 articles is 10x = SP of 9 articles.

• CP of 9 articles =9x

We know that,

Profit = SP−CP

${ \bf{\sf \: 10x-9x=x}}$

Profit % = Profit /CP × 100

${ \bf{\sf \: \frac{x}{9x} \times 100}}$

${ \bf{\sf \: \frac{100}{9} = 11 \frac{1}{9} }}\%$