This is from a Pearson online graded thing, if you don’t happen to recognize it. It probably would have taken 41/4 as a correct answer as well (IMO 40 1/4 is ambiguous, improper).

The software is more than capable of determining that 40.25=40+1/4 so its not really excusable (unless its specifically trying to teach fractions for middle schoolers or something)

That said, A lot of my calc 3 homework (multi variable calculus) in college was run by Pearson, and while it wasn’t perfect, the fact that it was autograded with multiple attempts allowed made learning the material easy. Immediate feedback is incredible.

Fuck Pearson though, honestly. This shit is expensive and it’s still got noticeable flaws. Last Pearson course I took kept trying to get me to use their shitty AI and pay extra for shit. I’m a student, not a potential customer to shake down.