A recipe for 12 cookies uses 2 cups of flour and 1.5 cups of sugar. You want to make 30 cookies. How much flour do you need?
Answer
5 cups
How to solve it
1
Scale factor: 30 ÷ 12 = 2.5
2
Flour: 2 × 2.5 = 5 cups
Hints
Find the multiplier (30 ÷ 12)
Multiply flour by the factor