is that spelled with an em-dash?

[sev]

If half my guests will be drinking twice as much white wine as red wine, but the other half of my guests will drink 50% more wine total than the first half and will drink three times as much red wine as white wine, what ratio of red wine to white wine should I purchase?

(thirteen bottles of red for each eleven bottles of white, by my math.)






(I did that in pen.)