The number is .
(Write 81 as )
(Write the fraction as decimal number)
The number is terminating, so it is rational.
The number is rational.
![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=792a52e95db1327f69ff83993b9cf0de.png\")
.![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=5f4a2311929d9d9b508c8b0f9c6879b9.png\")
(Write 81 as ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=7fb39b39417081d4644088ba4c44644a.png\")
)![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=de46f709b09bc3e7f6687aeb3d46c77c.png\")
(Write the fraction as decimal number)![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")
is rational.