Math
posted by Nakia .
A year on Mars is 686 Earth Days. (1) Which is longer, a year on Mars or a year on Earth? (2)By how many weeks is it longer? Submit two answers. Please explain how you got the answers. My 1st answer was Mars the 2nd answer I 82 1/2 weeks. Please help

How ever did you get 82 1/2 weeks?
686 days is 321 days longer than the 365day earth year.
321 days = 45 6/7 weeks
When you post a question, it is always helpful to show your calculations, so we can figure out where you went wrong, if you did.