Answer:
[tex]n = \frac{3}{5}[/tex]. Which means that Frank has been travelling out of the town 3 days for each five days.
Step-by-step explanation:
The fraction ([tex]n[/tex]) is obtained by dividing the number of days that Frank has been out of town (18 days) in the given period (30 days). That is to say:
[tex]n = \frac{t}{T}[/tex]
[tex]t[/tex] - Out-of-the-town period, measured in days.
[tex]T[/tex] - Given period, measured in days.
If [tex]t = 18\,days[/tex] and [tex]T = 30\,days[/tex], then:
[tex]n = \frac{18\,days}{30\,days}[/tex]
[tex]n = \frac{3}{5}[/tex]
Which means that Frank has been travelling out of the town 3 days for each five days.
