How many 2/5 parts are in 2 wholes

We can answer this by saying:

(2) / (2/5)

= (5*2) / 2 = 5

now to understand this think about it this way:

you cut a sandwich in 5 pieces and lets called 2 peices together a mega peice. how many mega peices in 1 sandwich? 2.5

so for 2 sandwiches its 5

5 because 2*5=10:2=5