Corrected entry: When Charlie's teacher is giving a lesson on percentages, he tells Charlie that he will use the number 200 as a means of calculating a simple percentage because can't figure out what percentage 2 out of 1,000 yields. This is simple to figure out even without a calculator. As someone who is sanctioned to be teaching mathematics, he should know this.
Phaneron
6th Mar 2012
Correction: Yes, he should, but apparently he is either lazy or not a very good teacher, so he simplifies the lesson. It's meant to be humorous.
wizard_of_gore ★