12-5 7/13 b) 5-2 3/5 c)8-1 6/7

a )  12 - 5 i 7/13 = 6 i 6/13 b) 5 - 2 i 3/5 = 2 i 2/5 c) 8 - 1 i 6/7 = 6 i 1/7

12 - 5[latex] frac{7}{13} = 11 frac{13}{13} - 5 frac{7}{13} = 6 frac{6}{13} [/latex] b) [latex]5 - 2 frac{3}{5} = 4 frac{5}{5} - 2 frac{3}{5} =2 frac{2}{5} [/latex] c) [latex]8 - 1 frac{6}{7} = 7 frac{7}{7} - 1 frac{6}{7} =6 frac{1}{7} [/latex]