4per 7+ 1per2-3per8×1per4

[tex] \frac{4}{7} + \frac{1}{2} - ( \frac{3}{8} \times \frac{1}{4} ) = \frac{219}{224} [/tex]
atau

[tex]( \frac{4}{7} + \frac{1}{2} - \frac{3}{8} ) \times \frac{1}{4} = \frac{39}{224} [/tex]