BCIT is considering decreasing its student to teacher ratio by 20%. Currently there are 35 students per instructor. By what amount should instructors be increased?
A) 25%
B) 20%
C) 45%
D) 15%
E) 10%

Question

Quizplus · Accepted Answer

Decreasing the student to teacher ratio by 20% means the new ratio will be 80% of the original. If 35 students per instructor is reduced by 20%, it becomes 28 students per instructor. To find the percentage increase in instructors needed to achieve this new ratio, we calculate the inverse proportion. Going from 35 to 28 students per instructor is an increase in instructors per student, which is equivalent to a 25% increase in the number of instructors to maintain smaller class sizes.

BCIT Is Considering Decreasing Its Student to Teacher Ratio by 20