9/40 is in its simplest form.
40 over 36 in lowest terms = 10/9 or 11/9
7/10 minus 9/8 = -17/40 in its lowest terms
9 over 50 is already a fraction in its lowest terms.
47/9 is already in its lowest terms
4/9 is already in lowest terms.
9/16 is already a fraction in its lowest terms.
5670 over 40950 in lowest terms is 9/65
120 over 135 in lowest terms is 8/9
117 over 208 in lowest terms is 9/16
60 over 270 in lowest terms is 2/9
14/18 is equivalent to 7/9 in lowest terms.
4 over 36 as a fraction in lowest terms is 1/9