Question

the cost price of an article is 30 percent less than its selling price.find the profit or loss as percent​

Answer 1

Answer

let SP = x

then according to question,

CP = x - 30% of x

= x- (30/100)× x

=x-(3/10)×x

= x-3x/10

= 7x/10

now as SP>CP therefore it is profit

so

profit = SP-CP

= x- 7x/10

= 3x/10

profit % = (profit/CP) × 100

= (3x/10/7x/10)× 100

= (3x/10 × 10/7x)×100

= 3/7 × 100 = 300/7 = 42.8 %