3/7
21/27 = 7/9
three sevenths
9 over 50 is already a fraction in its lowest terms.
4/9 is already in lowest terms.
47/9 is already in its lowest terms
9/16 is already a fraction in its lowest terms.
40 over 36 in lowest terms = 10/9 or 11/9
117 over 208 in lowest terms is 9/16
120 over 135 in lowest terms is 8/9
5670 over 40950 in lowest terms is 9/65
60 over 270 in lowest terms is 2/9
14/18 is equivalent to 7/9 in lowest terms.