It would be a ninth of a square yard. Nine square feet would be 1 square yard.
In general, for "square" measurements, you need to square the normal ratio. For example, there are 3 feet in a yard, so there are 3 squared, or 3*3 feet (9 feet) in a yard.
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1 foot = 0.33333333 yard
the answer is 40 square yards
.33333333 is how many yards is a foot.
3 foot = 1 yard so 30 foot x 30 foot floor = 10 yard x 10 yard floor = 100 square yards.
1 square yard = (3 x 3) = 9 square ft. Area of the room = (16 x 18) = 288 square ft = (288 / 9) = 32 square yards