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
1 answer:
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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