Question

This year, 75% of the graduating class of Harriet Tubman High School had taken at
least 8 math courses. Of the remaining class members, 60% had taken 6 or 7 math
courses. What percent of the graduating class had taken fewer than 6 math courses?

Answer 1

let's make this easy and just assume there are 100 students this will help with the percentages and won't affect them at all
Step 1) 75% of 100 took 8 classes, so that would be 75 ppl. and now there are only 25 left
Step 2) 60% of the 25 ppl. left took 6 or 7 classes, what is 60% of 25?

Step 3) Once you have solved 60% of 25, the remainder of students will give you the percentage of students who had taken less than 6 classes. Why? because we started with 100 students, so the remainder will the number and the percent