WTF ???

WTF ! Progress Card came to me almost failed Science ! Lucky Bo Kacky ! Hmm .. English 87/100 . i got 71 for the paper and so 87-71 = 16 . Chinese 86/100 . 71 for the paper too 86-71=15 . Science 56/100 :X Bad right ?? I actually got 42 half for actual paper but where did the 14 half come from ? Maths also quite "lan" . 66/100 ! WAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA ! GTG BYEEEEEEEE