28 into 17 best min fragment found: 7
  Cut up 28 sticks of length 17 like this:
    8 x (8 + 9)
    20 x (7 + 10)
  Reassemble as 17 sticks of length 28 like this:
    4 x (9 + 9 + 10)
    8 x (8 + 10 + 10)
    5 x (7 + 7 + 7 + 7)