I think I used ratio sytax and did it s little differently. So if someone are 5 of the 8 pizza slices, it was expected to be expressed as 5/8. What I did was express it as 5:3, 5 eaten and 3 uneaten.

For as salient as this memory was, she was an otherwise sweet and wonderful teacher. I still remember her fondly despite my genuine dismay at trying and getting a red marked sheet back.