First, express each mixed number as a simple fraction:
8 5/12 = (8x12+5)/12 = 101/12
1 3/4 = (4x1+3)/4 = 7/4
101/12 ÷ 7/4
multiply the first fraction by the reciprocal of the second fraction in order to divide:
101/12 x 4/7 = (101x4)/ (12x7) = 404 / 84 =101 /21
As a mixed number (using long division)
4 17/21