First turn any mixed numbers into improper fractions. 1 3/4 would be 7/4. Becuase you multiply the whole number by the denominator and then add the numerator.
So now you have 7/4 divided by 2/5. Whenever you divide, you flip the 2nd fraction upside down... known as the reciprocal. And after that you <em>multiply </em>the first number by the upside down 2nd number.
So now you have 7/4 X 5/2. When multiplying, just multiply the numerators across and the denominators across. As your answer, you get 35/8 or 4 3/8.
First you can change the mixed fraction (1 3/4) into an improper fraction. First you add the whole number add the nominator and then multiply what you get by the denominator. So 1+3=4, 4x4=16. Then we have 16/4 which simplifies to 4. Now we can add everything else because they all have common denominators (2/1, 4/1, 10/1). So 2+4=6. 6+10= 16. The final answer is 16 pounds.