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

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Question 1084216: If the average grade of an English class rose from 70 to 85, what is the approximate percent increase?
Found 3 solutions by Boreal, addingup, jim_thompson5910:
Answer by Boreal(15235)   (Show Source):
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It is increase over original amount or 15/70 or 21.4%

Answer by addingup(3677)   (Show Source):
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((85-70)/70)*100 = your answer

Answer by jim_thompson5910(35256)   (Show Source):
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Change in value = (new) - (old)
Change in value = 85 - 70
Change in value = 15

Divide this change in value over the original value to get 15/70 = 0.214286 approximately

Move the decimal over 2 spots to the right and you get 21.4286%

The approximate percent increase is about 21.4286%