1 1/4 + 1 2/3 + 1 1/5 = In fraction form

Turn all fractions to improper fractions.

5/4 + 5/3 + 6/5

Multiply all fractions by the lowest common denominator (the lowest number into which all of the bottom numbers divide evenly)

In this case it's 60

So multiply 5/4 by 15 to get 75/60

Multiply 5/3 by 20 to get 100/60

Multiply 6/5 by 12 to get 72/60

Now that all the denominators are the same, you can simply add the top numbers like you would do with any addition.

75 + 100 + 72 = 247

Therefore answer is 247/60 or 4 7/60