a fruit seller had some oranges . he sells 40 % oranges and still has 420 oranges . how many oranges he had originally ?
"explanation : he sells 40 % of oranges and still there are 420 oranges remaining = > 60 % of oranges = 420 ⇒ ( 60 × total oranges ) / 100 = 420 ⇒ total oranges / 100 = 7 ⇒ total oranges = 7 × 100 = 700 answer : option b"
add(420, multiply(420, divide(40, const_100)))