I finally made an account just for this. Please excuse any awkward formatting ;v;
Back in the early 2010s when I was but a small child, my mom downloaded this game for me onto my iPad Mini. The memory is a bit fuzzy, but I believe it was part of a series of kids games where the protagonist was this little purple yeti thing named... Purple. The art style was simple, animated in 2D and similar to that of Adventure Time.
In this game in particular, Purple and their friends are visiting the zoo. Scattered about the zoo (which, I feel I need to note, was one screen. The game was not open world.) were various mini-games that seemed to be teaching about fractions. I remember one of which being a game where you would pour orange juice into two cups evenly. I believe another, albeit fuzzy, was one where you would cut logs into smaller and smaller fractions. There were definitely more, but I don't remember them. Each time you completed a mini-game, you would unlock an animal to go into your own personal enclosure. As you unlocked more and more, they would slowly create a song a la My Singing Monsters. The only animals I remember were scarlet macaws singing in a "do-do-do" style in almost humorously deep voices.
I've tried going back through my app history to see if it might still be there, but it unfortunately wasn't. If anyone happens to know/find this game, I will be so incredibly grateful- it's been driving me crazy that I can't remember the name. Thank you so much :3!!