# How do you find the LCD for 7/(3b), 3/b?

Mar 11, 2018

$3 b$ is divisible by both $3 b \mathmr{and} b$

#### Explanation:

The LCD has to be divisible by both denominators.

However, in this case, $3 b$ has the other denominator as one of its factors. Therefore $3 b$ is the LCD.

Multiply the second fraction by $\frac{3}{3}$

$\frac{7}{3 b} , \text{ } \frac{3}{b} \times \frac{3}{3}$

$\frac{7}{3 b} , \text{ } \frac{9}{3 b}$