Question

A decade ago, the average class size at Yardley Middle School was 20 students. Now it is 25% smaller. What is the average class size currently?

Answer 1

To find the average class size currently, subtract 25% of the original average class size from the original average class size.

Step-by-step explanation:

To find the average class size currently, we need to calculate 25% of the average class size a decade ago and subtract it from the original average class size.

Step 1: Calculate 25% of 20. 25% of 20 is 0.25 * 20 = 5.

Step 2: Subtract 5 from 20. 20 - 5 = 15.

The average class size currently is 15 students.

Answer 2

Answer: 15 students.

1. Firstly, we need to count what is 25% of 20 (we know 25% = 0.25). Let’s do proportion:

100% = 20 |:2
50% = 10 |:2
25% = 5

2. So we know now, that 25% percent of 20 is 5. Now we just subtract to get the answer:

20 - 5 = 15

Answer: So now there is average of 15 students.