In a school there are 697 girls and the rest are boys. If there are 228 more girls than boys how many boys are there in that school?
here are three grades in that school, so we'll need to multiply by three. In each grade, there are four classes, so we'll need to multiply by four. In each class, there are 24 students, so we'll need to multiply by 24. That gives us 3 times 4 times 24, or 144. So, there are 144 boys in that school.