The easiest way is probably to find the symbols you want in the character map (start > all programs > accessories > system tools) and copy/paste them into a text document... then when you need them copy and paste them from the text document into the email..
¼ ½ ¾ ⅓ ⅔ ⅛ ⅜ ⅝ ⅞
Or just put 7/8... everyone will know what you mean



