Question

on selling 100 pens , a man gains the selling price of 20 pens .find the gain percent
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Answer 1

Answer:

25%

Step-by-step explanation:

let the selling price of 1 pen be Rs 1

so selling price of 100 pens is Rs 100

he gained selling price of 20 pens

means he gained Rs 20

cost price = selling price-profit

=100-20

=80

Cost price=Rs 80

profit percent=profit/cost price×100

=20/80×100

=25

So he gained 25%

Answer 2

Answer:

25%

Step-by-step explanation:

S.P. of 100 pencils − C.P. of 100 pencils = S.P. of 20 pencils

⇒ S.P. of 80 pencils = C.P. of 100 pencils 

Let C.P. of 1 pencil = Rs. 1

Then S.P. of 80 pencils = Rs. 100 

⇒ C.P. of 80 pencils = Rs. 80

∴ Profit % =80100−80×100=8020×100=25%