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9
18/27 in simplest terms is 2/3.
1/3
27/90 = 3/10
27/180 = 3/20
1 over 3
1 over 3.
3/4
27/36 = 3/4
27/693 = 3/77
It is: 9/27 = 1/3
27/441 = 3/49
27/63 = 3/7