GMAT Quantitative Reasoning Practice Test 2

Let's compare all the answers to $2∕7$, unless we find a larger fraction.
$2∕3$ is larger than $2∕7$. For now, $2∕3$ is the right answer.
$2∕3$ is also $6∕9$ and that is smaller than $7∕9$. For now, $7∕9$ is the right answer.
$7∕9$ is bigger than $7∕12$.
Bring $3∕5$ and $7∕9$ to a common denominator.
$7∕9=35∕45$ and $3∕5=27∕45$.
$7∕9$ is the largest fraction.