It would appear this isn't accurate. Of NATO's whopping EUR 2.5B annual budget, we contribute a little over 16%. Same as Germany.
NATO is resourced through the direct and indirect contributions of its members. NATO’s common funds are direct contributions to collective budgets, capabilities and programmes, which equate to only 0.3% of total Allied defence spending (approximately EUR 3.27 billion for 2023) to develop...
www.nato.int
If you're basing this on Trump's "NATO members need to pay their fair share" stuff, you have a grain of truth, as not all members had met their agreement to spend 2% of their GDP on defense (though the deadline to meet that target is 2024). However, that's in reference to what they're supposed to spend on their OWN defense. It's not as if the US was/is making up the difference in what the other countries were/are spending. While Trump was successful at getting some NATO members to raise their own defense spending, you'll note that it didn't actually save us any money, as our defense spending increased under Trump.
The fact that our defense spending makes up about 2/3 of the total defense spending by NATO allies is simply the choice we've made as a country. We're under no obligation to NATO to spend as much on defense as we do.