Ohio Republicans Refuse To Accept Election Results, Claim Abortion Bans Will Remain
(www.meidastouch.com)
That's not how you compare votes. It's not like the only other option for that 6.6% was to flip their vote to the opposite side. Abstaining is also a valid "vote", so to speak, and more likely for those who felt passionate enough to vote in favor of it in the first place if they weren't going to vote for it for some reason. If the number of people that make up that 6.6% abstained, i.e. just didn't vote at all, the measure would still have passed with the majority. The full 13.2% would have had to abstain from voting for the vote to have broken even. Which is why you take the difference between the vote percentages, not the difference to 50%.