Two correct percentages answer different questions
The 46% figure uses people who had ever used any dating site or app as its base. The 14% figure uses all U.S. adults. Removing the denominator makes the larger number look like nationwide penetration when it is not.
Both figures come from the same Pew survey, so they can be shown together without mixing vendors, years, or audience definitions.
Younger online daters were especially likely to have tried Tinder
Among online-dating users under 30, 79% said they had used Tinder. The comparable share was 44% for users ages 30–49 and smaller for older groups.
Again, this does not mean 79% of every American under 30 was using Tinder. It describes the subset who had already used online dating.
What the survey cannot tell us
The study does not provide a live count of active profiles, local gender ratios, swipes, matches, dates, or subscriptions. It also cannot show whether an account remained active after the survey.
For market-size claims, use company filings or audited platform metrics. For public adoption, the representative survey is the cleaner source.