Answer: 4 1/12 days (49/12)
Step-by-step explanation:
5 Days
Day 1 - 5/12 is swimming, meaning the rest of the day (7/12) was on the boat
Day 2 - 1/2 is hiking, meaning the rest of the day (1/2) was on the boat.
Day 3, 4, and 5 - All on Boat
3 Full days + 7/12 of a day (from day 1) + 1/2 of a day (from day 2)
Find the common denominator, in this case, 12 works
36/12 days + 7/12 days + 6/12 days = 49/12 days
Markuo spent 49/12 days of his vacation on a boat.