A recipe calls for 2 cups of sugar for every 3 cups of flour. If you want to make a batch that uses 10 cups of flour, how many cups of sugar will you need?
✓ Correct Answer: Option C
Set up a proportion: (sugar / flour) = 2/3 = x/10. Cross-multiply to get 3x = 2 * 10, so 3x = 20. Divide by 3: x = 20/3, which is approximately 6.67 cups of sugar.