I don't quite think you got his point since they are not literally the same. 32/64 implies an accuracy of 1/64th or .01563. 0.5 implies an accuracy of 0.05 or half of the increment of measurement (0.1 in this case).
I don't agree however that fractions are more accurate since it is arbitrary. For instance 0.5000 is much more accurate than 32/64 or 1/64.
Right now, for the US, your vote doesn't count if you vote 3rd party. We only have two political parties and they vehemently oppose each other (mostly in the House and SC).
Sounds like RCV would just fix the part where 3rd party voting typically is throwing away your vote.