Honorable Monks,

I am VERY, VERY new to PERL. I've written approximately 10 scripts all together. I am also not the best at math, which you'll see soon.

Here's some background.
The latest (and by far the largest) script I've tried is an online form-based survey that stores the answers to multiple choice questions to a text file. I'm grabbing the file data with a script and outputting it to another HTML page which shows the number of answers per question-option, and the percentages.

For example, Question 1A had 4 answers. Question 1B had 8 answers. Question 1A has 33.33% and Question 1B has 66.66% of the total answers to Question 1.

Here's the problem.
I can NOT find a way to round off the decimals so that when I run a cross-tabulation, I can prove that 33.33 + 66.66 = 100. Many of the questions produce percentages such that the percentage is n.50000000000 (etc),which skews my expected total of 100. And this is turning my hairs grey!

Clarification: I can get everything to add up to 100 when I use decimals out to 5 digits. But NOT when I try to round off. (Powers that be do not want to look at ugly decimal points).

Here's the math, such as it is:

@N; #array to store denominator for each question

for ($j=0; $j<$numPercents; $j++){        
          $thePercents[$k][$j] = (($theArrays[$k][$j] / $N[$j]) * 100)
+; 
                   $thePercents[$k][$j] =  sprintf "%3.5f", $thePercen
+ts[$k][$j];

#I was trying to deal with the n.5 issue but this clearly won't work .
+..

          $factor = POSIX::floor($thePercents[$k][$j]);
            
                   if (($thePercents[$k][$j] - .5) < $factor) {
                               $thePercents[$k][$j] = POSIX::floor($th
+ePercents[$k][$j]);
          } else {
                               $thePercents[$k][$j] = POSIX::ceil($the
+Percents[$k][$j]);
               }
            

        }

[download]

Please help!

In reply to How to get rounded numbers to =100% ?? by alarix

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