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Home > AC > Chapter 4 > Lesson 4.1.6 > Problem 4-58


Ms. B is making snickerdoodle cookies. Her recipe uses one-and-a-half teaspoons of cinnamon to make two-dozen cookies. If she needs to make thirteen-dozen cookies to give one cookie to each of her students, how much cinnamon will she need?  

Use proportions to solve this problem. Assign a variable to the unknown number of teaspoons of cinnamon.
For this case, you can use the variable

Multiply both sides by .

Multiply both sides by .

Divide by on both sides.

Remember to use the conversion factor to determine how many tablespoons and teaspoons Ms. B will need.