A recipe makes 12 servings and contains 3 cups of flour, 2 cups of sugar, and 1.5 cups of butter. You need to make 30 servings. How much flour do you need?
Answer
7.5 cups
How to solve it
1
Scale factor: 30 ÷ 12 = 2.5
2
Flour needed: 3 × 2.5 = 7.5 cups
Hints
Find the scale factor
Multiply ingredient by factor