def rel_humid_from_db_dpt(db_temp, dew_pt):
pws_ta = saturated_vapor_pressure(db_temp + <NUM_LIT>)<EOL>pws_td = saturated_vapor_pressure(dew_pt + <NUM_LIT>)<EOL>rh = <NUM_LIT:100> * (pws_td / pws_ta)<EOL>return rh<EOL>
Relative Humidity (%) at db_temp (C), and dew_pt (C).