Question

POSSIBLE POINT

Mrs. Numberline gave a pre-test in which only 8 of her students eamed A's. After teaching an inspiring unit on real numbers, 18 of her students earned
A's. The percent of change is

Answer 1

The percent of change in the number of students who earned A's before and after Mrs. Numberline taught her unit is calculated as the change in quantity divided by the original quantity, multiplied by 100, which equals 125%.

Step-by-step explanation:

To calculate the percent of change in the number of students who earned A's, we take the difference in the number of students earning A’s after teaching the unit compared to before. First, we find the change in quantity, which is 18 students (after) minus 8 students (before), giving us a change of 10 students. Then we divide this change by the original number (8 students) to find the percentage change.

The calculation is as follows:

• Change in quantity = New quantity - Original quantity = 18 - 8 = 10
• Percent Change = (Change in quantity / Original quantity) × 100 = (10 / 8) × 100 = 1.25 × 100 = 125%

So, after Mrs. Numberline taught her unit on real numbers, the percent of change in students earning A's is 125%.