![\"\"](\"/userfiles/image/steps_images/step1.JPG\")
Original: 14 T-books
\\
New: 16 T-books
\Since the new amount is greater than the original, this is a percent of increase.
\The amount of change = new T-books– original T-books.
\The amount of change = ![\"\"](\"/MathKey/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=23d08fe2eb72e8182d3385a89ac06554.png\")
.
![\"\"](\"/userfiles/image/steps_images/step2.JPG\")
Let r be the percentage of increase.
\Use the original number, 16 as the base.
\The percent proportion is
\![\"\"](\"/MathKey/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=735a6c358115a02545b2b702fb525c00.png\")
![\"\"](\"/userfiles/image/steps_images/step3.JPG\")
\ \
To solve for r, first find the cross products.
\![\"\"](\"/MathKey/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=c8c0e2cbe08c5ef76d2dbdd186b8aa6c.png\")
![\"\"](\"/MathKey/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=4caed0f48907f44925db28000972f4a6.png\")
(Multiply: ![\"\"](\"/MathKey/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=f6dc8f01a2788db6734d7a91b566a843.png\")
)
\
![\"\"](\"/MathKey/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=914b7d99b8de9b1f3df3fbb2177a779b.png\")
(Divide each side by 14)
![\"\"](\"/MathKey/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=3a48bd3fd6154019b79a04847b2a0991.png\")
(Cancel common terms)
![\"\"](\"/MathKey/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=99b52bd923fdc4ffe51aa4121229d826.png\")
(Divide: ![\"\"](\"/MathKey/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=4df1d2d3b04f78eac222e559e20a4833.png\")
)
The percentage of increase by 14.285%
\![\"\"](\"http://c4anything.com/userfiles/image/steps_images/solution.JPG\")
The percent of change is a percent of increase.
\The percentage of increase by 14.285%.