There are: (2*36)+9 = 81 inches
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36 in = 1 yd ⇒ 20 in = 20 ÷ 36 yd = 5/9 yd ≈ 0.56 yd
4/9 or 0.4444 square yards in 24 inches x 24 inches (2/3 yd x 2/3 yd).
12 inches x 12 inches = 144 square inches 1/3 yd x 1/3 yd = 1/9 square yard Those are probably the 2 most common equivalents.
15 yd^2 x 9 ft^2/yd^2 = 135 square feet
14 feet or 4 yd 2 ft