7 3/8 -1 1/4 =

7 3/8 -1 1/4 = ?

$$7 \frac{3}{8} -1 \frac{1}{4}\\\\ =7 + \frac{3}{8} -1 - \frac{1}{4}\\\\ =7 -1 + \frac{3}{8} - \frac{1}{4}\\\\ =6 + \frac{3}{8} - \frac{1}{4}\\\\ =6 + \frac{3}{8} - \frac{1*2}{4*2}\\\\ =6 + \frac{3}{8} - \frac{2}{8}\\\\ =6 + \frac{1}{8}\\\\ =6\frac{1}{8}$$