Question 123315
The given expression is: 


x - y - z   where x = 9, y = 2 1/2  and z = 3 3/4 


this can be written as: x = 9, y = 5/2 and z = 15/4  


So plugging all these values in the given expression we get: 


{{{9 - (5/2) -  (15/4)}}} = (36 - 10 - 15)/4    [taking LCM, we get]


We get: (36 - 25)/4 


= 11/4 


this can be written as: 2{{{3/4}}} in the form of a mixed fraction.