If the average grade of an English class rose from 70 to 85, what is the approximate percent increase? The percent increase is approximately 14%.
The percent increase is approximately 17%.
The percent increase is approximately 21%.
The percent increase is approximately 35%.

The correct answer would be C. The percent increase is approximately 21%

the third answer, 21%

Step-by-step explanation:

the change was 15% and the original was 70 so,

15/70

=.21  

.21*100=21%

I hope this helped and could I get brainliest?? :)

i think it would be 42cm

111

step-by-step explanation: