You might like to qualify 'decimal' with 'precision' and 'scale' arguments - eg decimal(9,5) gives you 9 decimal positions per number to play with - up to five of them to the right of the decimal point - check BOL for more details.
The advantage here is that less memory is used (5 bytes, instead of the default 17 per decimal number)
If you haven't even tried to resolve your issue, please don't expect the hard-working volunteers here to waste their time providing links to answers which you could easily have found yourself.