18 over 25 is 0.72
0.375
0.15
3/5 is 60% or 0.60
3 over 10 or if you are doing decimals, .3
1 over 3 as a decimal is 0.3 recurring.
2/3 = 0.667
0.6
Not unless you are going into decimals.
30/10 = 3 or 3.0
3.51 / 100 = .0351
1, 2, 3, 6, 9, 18, -1, -2, -3, -6, -9, -18