Answer:
2/3 of a mile.
Explanation:
We want to find out how many miles Claire walked in total. To find this out, we need to add up the amount of miles she walked on Saturday and the amount of miles she walked on Sunday. On Saturday, she walked 1/3 of a mile. On Sunday, she walked 1/3 of a mile. Add those up. 1/3+1/3 = 2/3 of a mile.