She was 5 hours on her computer
Number of hours worked = [tex]7\frac{1}{2}[/tex]
This is an improper fraction so first we convert it
[tex]7\frac{1}{2} = > \frac{15}{2}[/tex]
Time spent on her computer = [tex]\frac{2}{3}[/tex] [tex]of working hours[/tex]
∴ time spent on computer = (15/2)*(2/3)
= 5 hours
