![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
Original: 21.2 games
\New: 10.8 games
\Since the original games is greater than the new, this is a percent of decrease.
\The amount of change = New games– Original games.
\The amount of change = ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=be0ff8897b5cfbc91f545a2c0c865332.png\")
.![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step2.JPG\")
Let r be the percentage of increase.
\Use the original number, 21.2 as the base.
\The percent proportion is ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=48b69fad20798018e517b76e9c8b939e.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=fd11cc88650eb0ee9b809707c0f6b83a.png\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=7b3d54eabbcf337d3ac87b1a8cccab81.png\")
Divide each side by 21.2.
\![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=5cb9cf537356dcf25d51c011cc2a1a2e.png\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=876876f9c84879b436eafa03d868e3ba.png\")
The percentage of decrease by 49%.![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")
The percent of change is a percent of decrease.The percentage of decrease by 49%.