Question

if the CP of 10 articles is equal to the SP of 12 articles find gain or loss percentage​

Answer 1

the following attachment of the solution of your question

Answer 2

let cp of 1 article = x

=> cp of 10 articles = 10x

and

cp of 12 articles = 12x

according to question

sp of 12 articles = 10x

since cp is greater

it is a loss

loss = cp-sp = 2x

loss %= loss/cp *100

=2x/12x * 100

=100/6 percent

=50/3%

=16.67%