Here's how you do it without a table.
You probably want it in fractions because you have a ruler with fractions. Your ruler measures in something like 16ths, 32ths, 64ths, etc.
Multiply the decimal by that number, then round.
So, you had 25.061.
0.061* 16 = 0.976, round up to 1. So, the decimal is 1/16.
In that case, 0.061 * 64 = 3.904, round to 4, and 4/64 = 1/16, so you get no more accuracy measuring to 64ths.
For the other number, 0.755*16 = 12.08, round down to 12. 12/16 = 3/4. Once again, in this particular case, you get no more accuracy measuring to 64ths.