def rel_humid_from_db_enth(db_temp, enthalpy, b_press=<NUM_LIT>):
assert enthalpy >= <NUM_LIT:0>, '<STR_LIT>''<STR_LIT>'.format(str(enthalpy))<EOL>hr = (enthalpy - (<NUM_LIT> * db_temp)) / ((<NUM_LIT> * db_temp) + <NUM_LIT>)<EOL>rel_humid = rel_humid_from_db_hr(db_temp, hr, b_press)<EOL>return rel_humid<EOL>
Relative Humidity (%) at db_temp (C), enthalpy (kJ/kg)
    and Pressure b_press (Pa).