![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
Original: 27
\New: 73
\Since the new amount is greater than the original, this is a percent of increase.
\The amount of change = New amount– Original amount.
\The amount of change = ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=39db122fa4baa60c2575e04b665b3b76.png\")
.![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step2.JPG\")
Let r be the percentage of increase.
\Use the original number, 27 as the base.
\The percent proportion is ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=b2edf31e33df03e56de839b62bed9fbd.png\")
![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step3.JPG\")
To solve for r, first find the cross products.
\![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=6117aeb076d3af60ae29adf1b5d1621b.png\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=06f730fe85f8563184e2fd5330262a82.png\")
Divide each side by 27.
\![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=7f5f1eb422f0716accb4d30f27803bf0.png\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=0b2086145fc2d0a91a42ef3103967707.png\")
The percentage of increase is above 170%.![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")
The percent of change is a percent of increase. The percentage of increase is above 170%.