What is one fifth plus six eighth plus five fifth?

Answer 1

five divided by five is one. So your question is actually

6 + 1

-

8

Six and eight both divide by 2 so we can make it simpler:

3 + 1

-

4

So that's easy: one and three quarters.

You can also use Google to answer this question. Just enter into Google:

6/8 + 5/5

and it will give you the answer as a decimal: 1.75