The fraction 1/15 cannot be reduced any more.
15 over 30 reduced to lowest terms is 1/2
1/3
1/5
no the answer is 1 over 15
7/15 is already in its lowest terms (the highest common divisor of 7 and 15 is 1).
1/5
1/5
15/45 = 1/3
((1 / 15) / 10) over 9 = 0.000740740741
5/15 = 1/3 in its lowest terms
360 over 2520 in lowest terms is 1/7
1/5