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18/2 = 9/1 = 9
9/3
20/18 = 10/9 = 11/9
To change 18 over 9 to a mixed number, divide the numerator (18) by the denominator (9). The result is 2, which becomes the whole number part of the mixed number. The remainder after dividing is 0, so there are no fractional parts. The mixed number is 2.
There is no need to notate 9/9 as a mixed number, as it is equal to 1.