How do I divide one column in one df by another column in a different df in pandas?

Question

Here's my

If I have two dataframes (say df4avg and df5avg) with identical corrected wavelengths and different count rates, and I want to divide the df4avg count rate by df5avg's count rate and get an output of the corrected wavelength and the new divided value with a new column name (say 'ratio'), how would I do this?

Answer 1

If you want to add the ratio column in the df4avg Dataframe then

df4avg['ratio'] = df4avg['COUNT_RATE'] / df5avg['COUNT_RATE']