# If n represents a number, how do you write an expression for one-half of three less than the number?

Dec 3, 2016

$\frac{n - 3}{2}$ or $\left(\frac{n}{2} - \frac{3}{2}\right)$

#### Explanation:

First, let's write "three less than the number". "less than the number" means to subtract from the number. So we can write:

$n - 3$.

Now we need to take one-half of this. This means to multiple by $\frac{1}{2}$. Taking what we previously wrote and multiplying by $\frac{1}{2}$ gives:

$\left(\frac{1}{2}\right) \cdot \left(n - 3\right) \to \frac{n - 3}{2}$ or $\left(\frac{n}{2} - \frac{3}{2}\right)$