Explanation:
14 = 2×7
24 = 2×2×2×3
so, we can simplify by one of the 2 factors (which they have in common) :
24/14 = (2×12)/(2×7) = 12/7
now, the mixed number is the whole number (x/x) and the regaining fraction that is smaller than 1.
12/7 = 7/7 + (12-7)/7 = 7/7 + 5/7 = 1 5/7