To find out how many whole laps Jason will complete in 2/3 of an hour, we need to determine the number of laps he completes in 1/15 of an hour and then multiply that by 2/3.
Given that Jason takes 4/15 of an hour to complete one lap, we can calculate the number of laps he completes in 1/15 of an hour:
1 lap / (4/15) hour = 15/4 laps
Now we can find out how many whole laps he will complete in 2/3 of an hour by multiplying the number of laps he completes in 1/15 of an hour by 2/3:
(15/4 laps) * (2/3) = 30/12 laps = 2.5 laps
Therefore, Jason will complete 2 whole laps in 2/3 of an hour.