Answer:
Alaina should use 1 1/2 cups of flour.
Step-by-step explanation:
This question is asking for you to solve using fractions. If Alaina uses 2 1/4 cup of flour per batch then the amount she would need for just 2/3 of a batch would mean we need to multiply these fractions together. Before we can multiply a mixed number (2 1/4), we need to turn it in to an improper fraction. To turn a mixed number into an improper fraction, we multiply the whole number by the denominator, then add the numerator and put this value over the denominator: 4 + 2 + 1 = 9/4. Then we multiply:
[tex]\frac{9}{4} *\frac{2}{4} =\frac{18}{16}=\frac{3}{2}=1\frac{1}{2}[/tex]
