That depends how you define "close to".
12/15 = 4/5 = 0.8
So 12/15 is closer to 1 than to 0 or 0.5, but closer to 0.75 than 1.
30
1 over 3
12/7 = 1 5/7
It is: 12/9 = 1 and 1/3 in its simplest form
2
24%
12/25 = 48%
2/3
3/4
3
It is: 12/72 = 1/6 simplified
It is: 12/30 = 2/5