Final answer:
Carlos rode further on Sunday by 1.9107 miles, with the distances being 17.375 miles on Saturday and 19.2857 miles on Sunday after converting the fractions to decimal form.
Step-by-step explanation:
To determine on which day Carlos rode further, we need to compare the distances he biked on Saturday and Sunday. Carlos biked 139/8 miles on Saturday and 135/7 miles on Sunday.
First, convert these fractions to decimal form for easier comparison:
Saturday: 139/8 = 17.375 miles
Sunday: 135/7 = 19.2857 miles
Comparing these two distances, we can see that Carlos rode further on Sunday by:
135/7 - 139/8
= 19.2857 - 17.375
= 1.9107 miles
So, Carlos rode 1.9107 miles further on Sunday compared to Saturday.