Q3- Make a Hundred

With the digits 1 up to 9 you must make 100, using the following rules:

•      Each digit must be used exactly once.
•      The only allowed operation is addition.
•      Two single digits may be combined to form a number (so, for example, 2 and 4 may be combined to 24 or 42).
•      Two single digits may be combined to form a fraction (so, for example, 2 and 4 may be combined to 2/4 or 4/2).

   
The Question:- How can this be done?