Convert US fluid ounce to US cup
Unit definitions
US fluid ounce
$\frac{1}{128}$ of a US liquid gallon is a US fluid ounce.
US cup
The US cup is equal to $8$ US fluid ounces.
How to convert US fluid ounce to US cup
$$\text{Volume}_{\text{cup (us)}} = \frac{\text{Volume}_{\text{oz (us)}}}{8}$$
Examples
Example 1
Convert $40.0\ \text{oz (us)}$ to $\text{cup (us)}$.
$$\text{Volume}_{\text{cup (us)}} = \frac{40.0}{8}$$
$$\text{Volume}_{\text{cup (us)}} = 5$$
$$\therefore \ 40.0\ \text{oz (us)} = 5 \ \text{cup (us)}$$
Example 2
Convert $75.0\ \text{oz (us)}$ to $\text{cup (us)}$.
$$\text{Volume}_{\text{cup (us)}} = \frac{75.0}{8}$$
$$\text{Volume}_{\text{cup (us)}} = 9.375$$
$$\therefore \ 75.0\ \text{oz (us)} = 9.375 \ \text{cup (us)}$$
Example 3
Convert $115.0\ \text{oz (us)}$ to $\text{cup (us)}$.
$$\text{Volume}_{\text{cup (us)}} = \frac{115.0}{8}$$
$$\text{Volume}_{\text{cup (us)}} = 14.375$$
$$\therefore \ 115.0\ \text{oz (us)} = 14.375 \ \text{cup (us)}$$
Example 4
Convert $135.0\ \text{oz (us)}$ to $\text{cup (us)}$.
$$\text{Volume}_{\text{cup (us)}} = \frac{135.0}{8}$$
$$\text{Volume}_{\text{cup (us)}} = 16.875$$
$$\therefore \ 135.0\ \text{oz (us)} = 16.875 \ \text{cup (us)}$$
Example 5
Convert $190.0\ \text{oz (us)}$ to $\text{cup (us)}$.
$$\text{Volume}_{\text{cup (us)}} = \frac{190.0}{8}$$
$$\text{Volume}_{\text{cup (us)}} = 23.75$$
$$\therefore \ 190.0\ \text{oz (us)} = 23.75 \ \text{cup (us)}$$