Correlation

Hey Guys hows it going. Im seeking the best way to establish if there is a correlation between two columns

Could anyone offer any insight on how best to achieve this?

Please see the attachment - col b shows occupancy levels high to low and col c shows the cancellation rate.

i've never used the =correl before!

I was thinking that maybbe i should break the data up into rankings by percentile and use a scatter graph

Any help warmly recieved!