Cost price of 8
articles =Rs48
=> Cost price of 1 article =Rs488=6
And Cost price of 8 articles =Rs6×20=Rs120
Selling price of 5 articles =Rs37.50
=> Selling price of 1 article =Rs37.55=Rs7.5
And Selling price of 20 articles =Rs7.5×20=Rs150
Now, Profit % =S.P.−C.P.C.P.×100=150−120120×100=30120×100=25 %