To find the angle between the hour and minute hands, we use the formula:
\[
\text{Angle} = \left| 30H - \frac{11}{2}M \right|
\]
where \( H \) is the hour and \( M \) is the minute.
For 7:30:
- \( H = 7 \)
- \( M = 30 \)
Substituting into the formula:
\[
\text{Angle} = \left| 30 \times 7 - \frac{11}{2} \times 30 \right| = \left| 210 - 165 \right| = \left| 45 \right|
\]
Thus, the angle between the hour and minute hands at 7:30 is **45 degrees**.