Question

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%.

Answer 1

Answer:

I think its 14%.......xD

Answer 2

Given:

Initial average marks of an English class = $70$

Final average marks of an English class = $85$

To find:

The approximate percent increase in average marks

Formula:

$Percentage\;increase\;=\;\frac{Initial\;value\;-\;Final\;value}{Initial\;value}\;\times\;100$

Step-by-step explanation:

Initial value - Final value = $85\;-70\;=\;15$

$Percentage\;increase\;=\;\frac{15}{70}\;\times\;100$

$Perecentage\;increase\;=\;0.21\;\times\;100$

$Perecentage\;increase\;=\;21\%$

Answer:

Therefore, the approximate percent increase is $21\%$