Question

A publisher allows 15% discount on the marked price of a book .he still makes a profit of 19% on it . fint the gain percent if he sells it on the marked price​

Answer 1

Let the cp of the book be 'x'.
sp =119x/100
mp= (100/85) x (119x/100) = 119x/85 .
gain= (119x/85) - x =34x/85
gain percent= (34x/85) x ( 1/x ) x 100 = 40.