Question

the cost price of 12 pens is equal to selling price of 10 pens .. find the profit percentage

Answer 1

I didn't mistake in image the Below ans is right

Cp/sp=10/12

Cp=10
Sp=12

Profit =12-10
=2

Profit %=2/10 x100

=20%
This is ur ans hope it will help you in case of any doubt comment below

Answer 2

Cp of 12 pens = Sp of 10 pens
then
Cp =10rs
Sp = 12 rs
profit= sp-cp
profit =12-10 = 2rs
profit% = profit ×cp /100
profit % =
$2 \div 100 \times 10$
profit %=1/5%