Question

what is 7 7/8- 31/4 simplified

Answer 1

7 7/8  = 63/ 8 ;
31/ 4 = 62/ 8 ;
63 / 8 - 62 / 8 = 1 / 8 .

Answer 2

$7\frac{7}{8}-\frac{31}{4}=7\frac{7}{8}-\frac{28+3}{4}=7\frac{7}{8}-7\frac{3}{4}=7\frac{7}{8}-7\frac{3\cdot2}{4\cdot2}=7\frac{7}{8}-7\frac{6}{8}=\boxed{\frac{1}{8}}$