if a book is sold at 9 % profit instead of 9 % loss , it would have brought rs 9 more . find out the cost price of the book
let c . p . of the book be rs . ’ x ’ given , 1.09 x - 0.91 x = 9 = > 0.18 x = 9 = 9 / 0.18 = rs 50 answer : c
divide(multiply(const_100, divide(9, const_2)), 9)