Answer:
[tex]\frac{5}{3}[/tex] km left to run.
Step-by-step explanation:
First, lets calculate the distance Gavin has ran so far.
To do that, we can find out 2/3 of 5 km:
[tex]\frac{2}{3} \times 5 = \frac{10}{3}[/tex]
To calculate the distance left to run, we subtract the total distance by the distance he ran so far which is:
[tex]5 - \frac{10}{3} = \frac{15}{3} - \frac{10}{3} = \frac{5}{3}[/tex]
So he has [tex]\frac{5}{3}[/tex] km left to run.