Dear parents, have you seen a question that goes like this: A class has 40 students. 15 students are boys. What percentage of the students are girls? For some reason, quite a number of students do not get a…

Dear parents, have you seen a question that goes like this: A class has 40 students. 15 students are boys. What percentage of the students are girls? For some reason, quite a number of students do not get a…