try it this way....if there is empty spaces after the decimals or before, add 0's to make them the same length....that doesn't sound right...let me just show u....oh, and make sure ur decimals line up
15.142
15.410
01.547
05.400
51.400
now, least to greatest : 1.547, 5.4, 15.142, 15.41, 51.4