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topjm [15]
3 years ago
5

At Furnace Woods School, enrollment increased from 320 students in 2006  to 349 students in 2007. What is the percent increase i

n enrollment? Please let me know how to do it without the computer calculations so I can do problems like these on my own
Mathematics
1 answer:
seraphim [82]3 years ago
6 0

Here are two slightly different ways to look at it. 
Both ways do exactly the same thing.

<u>Way #1:</u>
Divide  (the new number) by (the old number)

 349 / 320 = 1.090625

Change the quotient  1.090625  to percent.

To change any number into percent, multiply it by 100, or move the decimal point  2 places to the right.

   1.090625  ==>  109.06 %

The new number  (349)  is  109.06%  of the old number  (320).

But the old number was  100%  of itself.  So the new number
is  <em>9.06%  more</em> than the old number was.
================================

<u>Way #2:</u>
How much bigger is the new number ?

       (349 - 320) = 29 bigger

Divide the increase by the old number:

       29 / 320 = 0.090625

Change the quotient to a percent.

     0.090625 = 9.06%

The <em>increase</em> is<em>  9.06%</em>  of the old number.


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