The division formula lets you answer exactly that question (and many more): from budget splits, ratios of expenses, and averages to scaling anything you can think of where you divide one number by another. Formatting: After you get results, you can format the cell either as general number, or percentage, or even custom format depending on what makes sense in context. https://budgetexcel.com/how-to-use-the-division-formula-in-excel/