So the ratio is 8:11, that means you flip it and multiple. 11 packs of tortillas get you 88 tortillas. 8 packs of cheese gets you 88 cheese. They don't share a common denominator so that's the lowest amount you can get without breaking a pack or getting spares.
If they do share a common denominator you can reduce. For instance 8buns and 10 hotdogs means 8:10 or 4:5 making the equivalent point 40 of each.
