Well you see if you want to cut the two watermelons in 1/8th form then everyone gets 1. If you cut it into 1/16th then you get 2. Although when cutting the watermelon into 1/16th form two of them will equal 1/8th. These are all equal amounts of watermelon. 1/2, 2/4, 4/8, 8/16, 16/32 etc.