SOLUTION: a vacuum cleaner dealership sold 430 units in 2011 and 471 units in 2012. Find the percent increase or decrease in the number of units sold

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Question 1128746: a vacuum cleaner dealership sold 430 units in 2011 and 471 units in 2012. Find the percent increase or decrease in the number of units sold
Answer by ikleyn(52804) About Me  (Show Source):
You can put this solution on YOUR website!
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Percentage increase is  %28%28471-430%29%2F430%29%2A100 = 9.535%.

Take the difference;  relate it to the  BASE  value;  then multiply this fraction by  100  to get percentage.