This is difficult because you would first think to find a common denomiator between all 3 fractions. But you cant do that.
So take the first two and add...
4/6 x 5/5 = 20/30
3/5 x 6/6 = 15/30
15/30 + 20/30 = 25/30
25/30 + 2/4
25/30 x 2/2 = 50/60
2/4 x 15/15 = 30/60
50/60 + 30/60 = 80/60
80/60 = 8/6 = 4/3 = 1 1/3
make sense?
