Final answer:
Terry and Ricky traveled 50% of the total distance on the first day of their canoe trip, calculated using the formula (Part / Whole) × 100%.
Step-by-step explanation:
The student's question involves calculating the percentage of a total distance traveled. To find the percentage that Terry and Ricky traveled on the first day of their canoe trip, we compare the distance traveled on the first day to the total distance of the trip. The formula to calculate percentage is:
(Part / Whole) × 100%
So, taking the 13 miles they traveled on the first day as the part, and the total 26 miles as the whole, we get:
(13 miles / 26 miles) × 100% = 0.5 × 100% = 50%
Therefore, Terry and Ricky traveled 50% of the total distance on the first day.