> 1 in 4 is 25%

N in M fractions are used in casual copy to convey an approximate value. Finding a "1 in 4" number on a dated website does not mean that the current number is literally 25%.

It's an approximation and not meant to be taken as a precise value. They're not going to update the website to "26 out of 100" if the number changes.

Citing an old, approximate number in some non-specific website copy does not invalidate anything.

You are nitpicking. By that logic, since we can never know the precise number because that number is always moving, we simply don’t know what the number is and all this is moot.