Which fraction is the odd one out? Explain your answer

A 6/10 b 12/20 c 18/30 d 3/4

Any is very appreciated! (picture is provided below)not sure how to do this at all won't lie

Ateacher noticed 5/8 of the students were wearing either blue shorts or white shorts. write two different ways this could be done.

Write and solve a real word problem that involves determining distance on a coordinate plane