Hi there!
If the whole punch bowl is 12/12, and he spilled 5/12, that leaves 7/12 left in the bowl. I know this because I subtracted 5/12 from the whole.
If you found this especially helpful, I'd appreciate if you'd vote me Brainliest for your answer, if other people did not provide a helpful answer (but, I'm sure they did!). I want to be able to assist more users one-on-one! :)