Question 52525
IF YOU ARE COMBINING ALL THESE NUMBERS & FRACTIONS THEN YOU GET 

2-7/4-1+15/2 OR 2-1.75-1+7.5=6.75 

OR USING FRACTIONS WITH A COMMON DENOMINATOR WE GET 

8/4-7/4-4/4+30/4=27/4 OR 6 3/4=6.75