i have numerical data on column a. It consists of a list of about 100
numberswith a total on the last row of the column a. on column b i want the
percentage of of the total in column a that each corresponding row
represents. i tried using the fill handle by inputting the formula in the
first few rows of b (eg. b2 =a2/a100, b3 =a3/a100) and then tried to
highlight both and use the fill handle to get the rest of the column and not
have to input one by one but i get an error #div/0! for all of column b after
the first 2 rows.

What is wrong and how can it be fixed?
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thanks in advance