How much is 21 inches of a yard?if a yard is 36 inches?

Answer 1

That would be 21/36ths of a yard. Or since those two numbers are divisible by 3, it could be stated as 7/12ths.
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Answer 2

21/36 = ???

Answer 3

7/12ths

Answer 4

21/36 or 58.3%