Answer:
Samuel uses 1 11/12 cups of flour.
Explanation:
Okay, this is assuming he uses the rest of the flour she didn't use.
The first step would be to find the Greatest Common Factor(GCF) of the fractions
2 1/4 and 1/3 have different denominators, but they both can divide into 12.
1/4 * 3/3 = 3/12
1/3 * 4/4 = 4/12
Now we can also convert 2 3/12 into an improper fraction to make it easier
2* 12/12 = 24/12
24/12+ 3/12 = 27/12
Here's the part were we subtract the two numbers.
27/12- 4/12 = 23/12
The last step is to simplify the fraction
23/12 = 1 11/12 cups