Question

What must be added to 1/6 to get 2/3? *

Answer 1

1/2 must be added to 1/6 to get 2/3.

Answer 2

let X be added to 1/6 to get 2 / 3

x+1/6 =2/3

x = 2/3-1/6

on solving (by taking the L.C.M of the denominator)

x = 3/6

x = 1/2 (answer)