Cassie uses 1/2 of a cup of vinegar in her salad dressing recipe. How much vinegar would Cassie use to make 2/3 of a recipe?
Write your answer as a fraction or as a whole or mixed number.
cups

56.6

step-by-step explanation:

the ratio of the perimeters is equal to the scale.

the ratio of the areas is equal to the square of the scale.

34 / 20 = k

a / 19.6 = k²

substituting:

a / 19.6 = (34 / 20)²

a = 19.6 (34 / 20)²

a ≈ 56.6

the answer is 8/21

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step-by-step explanation: