Question

If the average grade of an English class rose from 70 to 85, what is the approximate percent increase?

O The percent increase is approximately 14%.
O The percent increase is approximately 17%.
O The percent increase is approximately 21%.
O The percent increase is approximately 35%.

Answer 1

To determine the percent increase of a class's average grade from 70 to 85, the change is divided by the original average and then multiplied by 100, resulting in approximately a 21% increase.

Step-by-step explanation:

To calculate the percent increase from an original average grade of 70 to a new average grade of 85, you can use the following formula:

Percent Increase = ((New Average - Original Average) / Original Average) * 100

In this case:

Percent Increase = ((85 - 70) / 70) * 100 = (15 / 70) * 100 = 21.43%

So, the approximate percent increase in the average grade is approximately 21%.