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Multiply 11 and 2 twelfths by 12 and 11 twelfths.

11 2/12 X 12 11/12 = 134/12 X 155/12 = 144 17/72 square feet.

If you are dealing with floor covering then the width is usually sold in 12 feet units and you would multiply the width 12 feet times the length of practically 13 feet, which is 156 square feet.

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16y ago

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