It is already reduced to its lowest terms.
Chat with our AI personalities
15 over 30 reduced to lowest terms is 1/2
7/15 is already in its lowest terms (the highest common divisor of 7 and 15 is 1).
5 fifteenths (5/15) reduced to lowest terms is 1/3
45/66 = 15/22
15/18 can be reduced to 5/6