Final answer:
Justin takes 8.25 days to complete the yard job.
Step-by-step explanation:
To determine the number of days Justin takes, we can use the fact that it takes him 55% of the time it takes Peyton. If Peyton takes 15 days, we can find Justin's time by multiplying 15 by 0.55. Therefore, Justin takes 8.25 days to complete the yard job.