if the price of a book is first decreased by 15 % and then increased by 10 % , then the net change in the price will be :
"explanation : let the original price be rs . 100 . decreased by 15 % = 85 then increased 10 % on rs 85 = 85 + 8.5 = 93.5 net change in price = 100 - 93.5 = 6.5 answer : c"
subtract(const_100, multiply(multiply(divide(subtract(const_100, divide(multiply(const_100, 15), const_100)), const_100), divide(add(const_100, divide(multiply(const_100, 10), const_100)), const_100)), const_100))