Question

A waitress works 1.75 hours less in the afternoon than in the evening. If she works 5      1/8

Answer 1

Let $x$ be the number of hours that the waitress works in the evening.

We know for our problem that she works $5 \frac{1}{8}$ in the afternoon and that she works 1.75 hours less in the afternoon than in the evening, so:
$x=5 \frac{1}{8} -1.75$
Since $\frac{1}{8} =0.125$, we can rewrite our expression:
$x=5.125-1.75$
$x=3.375$

We can conclude that she works 3.375 hours in the evening, or expressed as a mixed fraction: $3 \frac{3}{8}$ hours.