6 1/2-7/8 / 5 11/16 evaluate the expresson

If you meant

(6 1/2-7/8) / (5 11/16)
= (13/2 - 7/8)/(91/16)
= (45/8) / (91/16)
= (45/8)(16/91)
= 90/91

http://www.google.ca/?gws_rd=cr&ei=5jxTUo_zDrDc4AOOoYCADQ#q=(6+1%2F2-7%2F8)+%2F+(5+11%2F16)