Word 2010's AutoCorrect feature can build common fractions for you. Actually, Word doesn't build fractions as much as it pulls them from a set of existing fraction "characters." Sadly, Word has only a few of those fraction characters. When you need your own, specific fraction, such as 3/64, you can create it on your own:

  1. Press Ctrl+Shift+= (the equal sign).

    This keyboard shortcut enables the superscript command. (Superscript refers to a letter or number written above and to the side of another).

  2. Type the numerator — the top part of the fraction.

    For example, type 3 for 3/64.

  3. Press Ctrl+Shift+= again.

    This time, the key combo turns off superscripting.

  4. Type the slash mark (/).

    This slash mark becomes the divider in the fraction.

  5. Press Ctrl+= to turn on subscripting.

    Subscripting involves a letter or number below and to the side of another.

  6. Type the denominator — the bottom part of the fraction.

    The denominator in 3/64 is 64.

  7. Press Ctrl+= to turn off subscripting.

    There’s your fraction.