Answer:
Option A) 3 tablespoons of chili powder
Explanation:
we know that
Sam's recipe is for 1 liter of chili
Sam used 2/3 tablespoons of chili powder to make 1/9 liters of chili
so
Multiply by 9 both quantities to obtain how much tablespoons of chili powder is required for 1 liter of chili
(2/3)9=6 tablespoons of chili powder are required for 1 liter of chili
To make 1/2 the recipe, multiply 6 tablespoons of chili powder by 1/2
6(1/2)=3 tablespoons of chili powder