Michael J. answered • 03/22/15

Tutor

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Effective High School STEM Tutor & CUNY Math Peer Leader

Lets use a proportion.

Ratio of ounces = Ratio of servings

(10 / x) = (9 / 13)

Solve for x. Cross multiply.

9x = 130

x = 14.44

14.44 ounces of rice noodles are needed to make 13 servings.