Question

A fruit seller had some apples. he sells 20% apples and still has 80 apples. originally, he had:

Answer 1

let he had X apples
sold=20%of x=20x/100=x/5
so left =x-x/5=4x/5
so this implies 4x/5=80
so x=80*5/4=20*5=100
so he had 100 apples originally

Answer 2

i think he had 100 apples.
 
20÷100×100= 20
80÷100×100=80