Turn you mixed numbers into fractions 8 becomes 8/1 and 4 2/3 becomes 14/3. Then you multiply the numerators to get 112 (8 × 14=112) as you new numerator. Then multiply your denominators to get 3 (1 × 3=3) as you big denominator. Your improper fraction is gonna be 112/3 then you turn it into a mixed number by finding out how many times 3 goes into 112 to get your whole number (37) with 1/3 leftover. If you need me to explain anything any more just tell me :).