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Divide the sum of $\frac{65}{12}$ and $\frac{12}{7}$ by their difference.
To do:
We have to divide the sum of $\frac{65}{12}$ and $\frac{12}{7}$ by their difference.
Solution:
Sum of $\frac{65}{12}$ and $\frac{12}{7}$ is,
$\frac{65}{12}+\frac{12}{7}=\frac{65\times7+12\times12}{84}$ (LCM of 12 and 7 is 84)
$=\frac{455+144}{84}$
$=\frac{599}{84}$
Difference of $\frac{65}{12}$ and $\frac{12}{7}$ is,
$\frac{65}{12}-\frac{12}{7}=\frac{65\times7-12\times12}{84}$ (LCM of 12 and 7 is 84)
$=\frac{455-144}{84}$
$=\frac{311}{84}$
Therefore,
$\frac{599}{84}\div\frac{311}{84}=\frac{599}{84}\times\frac{84}{311}$
$=\frac{599\times84}{84\times311}$
$=\frac{599}{311}$
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