• Numbers are normally aligned right so that the various places (unit, tens, etc.) are in columns. 
  • If the numbers are integers, this just means right-aligning the numbers. 
  • If they have decimal fractions, then the decimal places should be aligned, with the units digits all in a vertical line.
     Examples:
Right and left alignment of numbers

Right and left alignment of numbers
Alignment of amounts
  • In excel sheets default text is left aligned and default numbers are right aligned. So, easy to differentiate numbers and text.