I agree with Mike on how this works. I guess the confusion comes from the fact that in multiple-choice polls, we each define "percentage" in two different ways:
- Percentage as the ratio of how many voters out of all voters voted for an option-- so if all voters choose option A as well as other options, then option A has 100% (and other options have other percentages).
- Percentage as a comparison to the other options in the poll, or popularity in comparison to the other options. (In this case you can't really call it "percentage" anymore, you'd have to call it "popularity ratio" or something)
For example there are 10 voters and 2 options. All ten people voted for option A, and five people voted for option B. With definition #1, this would be:
A. 100% (100% of the people voted for this)
B. 50% (50% of the people voted for this)
With definition #2, this could be:
A. 66.6% (10 of 10 people voted for this, thus it is twice as popular as option B)
B. 33.4% (5 of 5 people voted for this, thus it is half as popular as option A)
For people who want the percentages to add up to 100%, the second definition makes sense. For those of us who think of percentage as the ratio of how many people out of the total number of voters voted for a particular option, definition #1 makes more sense.
Personally, I'd keep it as-is.