This year, Slytherin got 5% less House points than the winner Gryffindor. What is the minimum number of House points Slytherin needed more to win if Gryffindor got 420 House points?
So first you take 5% of 420 and you get 21. Then you subtract the 5% (21) from 420 and you get 399. So, Slytherin got a 399 points! Hope I helped and also I love Harry Potter so much, so this question caught my eye, lol! :P
