Let a, b, c, d, e, f, g, h, i be distinct integers from 1 to 9 . The minimum possible positive value of

\frac{a \cdot b \cdot c-d \cdot e \cdot f}{g \cdot h \cdot i}

can be written as \frac{m}{n}, where m and n are relatively prime positive integers. Find m+n.