Yes: 4/20 = 1/5
20 over 25 reduced to its lowest term is 4/5.
Yes, it can be reduced to 4/5.
20 over 35 reduced to its lowest terms is 4/7
2 over 4
16/20 = 4/5
15/20 = 3/4
4/5
5/20 reduces to 1/4
20, although if you reduced 15/20 to 3/4, the common denominator would be 4.
20 over 36 simplified is 5 over 9.
4/5
28 over 20 reduced = 7/5