Forget donuts. Let's talk real magnificence - rye bread!
I used to think stories like the 2 for 25 were arithmetic issues, but I think so less and less. I think they're reading comprehension. It isn't that people can't do basic arithmetic - it's that they don't consider what they're reading enough to bother taking the extra second. Some of that I've learned from this forum, where we all misread or gloss over questions at times. Most of it is out in the world.
Simple arithmetic (as opposed to mathematics) is easy if people focus. I say that as a person with next to no mathematical ability, and probably a learning disability in that field. But you have to stop and consider, and when it comes to analyzing anything, speed kills.
Quick judgments of complex situations lead us to very weird conclusions, as we see in the world around us. If you look quickly at an ad and don't ask yourself why it's set up as it is, you can easily fall for it. It's not stupidity or poor education - it's inattention. The leopards must have loved that trait in our ancestors.