You know that the recipe calls for this amount of pumpkin:
Then, if he needs to double the recipe, he needs to multiply that amount by 2. Then:
You can convert that Improper Fraction to a Mixed Number:
1. Divide the numerator 4 by the denominator 3.
2. The Quotient obtained (the result of the Division) is 1. This will be the whole number part.
3. The Remainder is 1. This will be the new numerator.
4. The denominator does not change.
Then:
Therefore, the answer is: Option D.