how can I avoid dividing by zero?

hi all,  how can I remove the zero values to avoid dividing by zero the error I got is as the following: fatal:divide: Division by 0, Can't continue fatal:Div: operator failed, can't continue my script is attached thanks   Mohamed Ibrahim El-Sayed OMAR Egyptian Meteorological Authority Scientific Research Department Climate Studies Centre Kobry El-Quobba, P.O.Box. 11784 Cairo, EGYPT Mobil phone  : 002 0160802805  Home Phone : 002 0482370261

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