Question

I'm having trouble figuring out how to get the answer, 10/7, which is listed in the answer key of some practice problems. Could anyone explain how to get that answer? I believe you should multiple everything by the LCD, 30 but I'm lost past that
$\frac{a}{3} - \frac{a}{10} = \frac{1}{3}$

Answer 1

Okay, so you multiply every fraction to make 30, so it should look like this:
$\frac{10a}{30}$ - $\frac{3a}{30}$ = $\frac{10}{30}$ it should equal $\frac{7a}{30}$ =