300
Mary has a job. She works Monday, Tuesday, Wednesday, Thursday and Friday (5 days a week). Every week she calls in sick one day. What is the fraction that shows how often Mary calls in sick.
A. 1/3
B. 5/4
C. 1/5
D. 4/5
C. 1/5
PS Mary is probably already fired from her job because you can't keep a job when you call in sick all the time.