Question

6 4/5 - 2 1/5 is what?

Answer 1

It is 4 3/5
 6 - 2 = 4
 
4/5 - 1/5 = 3/5

Answer 2

6-2=4     whole number
4/5-1/5=3/5 fraction
  put the fraction and whole number toger and you'll get
since the denominator is the same it's easier to subract

4 3/5    <--- answer