Question

the cost price of 10 articles is equal to the selling price of 8, find the profit or loss percent

Answer 1

Profit =(10-8)=2
%=2*100/8
=25%.

Answer 2

let cp of 1 article =x

cp of 8=8x

sp of 8=10x

p=sp-cp

p=2x

$p \% = \frac{p}{cp} \times 100$
p%=2x÷8x×100
=25%