How Do You Solve a Word Problem Where You Multiply Fractions and Work Backwards?

Could anyone really eat 15 feet of a sub sandwich in one day? That's how much this math problem says he ate. He actually started out with a bigger sub sandwich. How big was it to start? The instructor uses a table to illustrate how you can work backwards to find the answer.

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6th - 12th
Algebra I
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Flipped Classroom
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