if 5 % more is gained by selling an article for rs . 350 than by selling it for rs . 340 , the cost of the article is ?
"let c . p . be rs . x . then , 5 % of x = 350 - 340 = 10 x / 20 = 10 = > x = 200 answer : c"
divide(subtract(350, 340), divide(5, const_100))