a man gains 10 % by selling an article for a certain price . if he sells it at double the price , the percentage of profit will be .
"explanation : let the c . p . = x , then s . p . = ( 110 / 100 ) x = 11 x / 10 new s . p . = 2 ( 11 x / 10 ) = 22 x / 10 profit = 22 x / 10 - x = 12 x / 10 profit % = ( profit / c . p . ) * 100 = > ( 12 x / 10 ) * ( 1 / x ) * 100 = 120 % option b"
add(multiply(subtract(multiply(add(const_1, divide(10, const_100)), const_2), const_1), const_100), const_100)