What should be added to `(1/2+1/3+1/5)` to get 3 ?

Explanation

Firstly we should calculate `(1/2+1/3+1/5)`
`=1/2+1/3+1/5`
Taking LCM, we get LCM as `30`.
`=(15+10+6)/30`
`=31/30`

Now, the sum of the two numbers is `3`.
One of the numbers is `31/30`.
Let the other number be `x`.
Now,
`x+31/30=3`
`x=3-31/30`
Taking LCM, we get the LCM as `30`.
`x=(90-31)/30`
`x=59/30`
Hence, the other number is `59/30`.