if 5 % more is gained by selling an article for rs . 220 than by selling it for rs . 160 , the cost of the article is ?
"let c . p . be rs . x . then , 5 % of x = 220 - 160 = 60 x / 20 = 60 = > x = 1200 answer : b"
divide(subtract(220, 160), divide(5, const_100))