Question

Dakota makes a salad dressing by combining 6 1/2 fluid ounces of oil and 2 3/8 fluid ounces of vinegar in a jar. She then pours 2 1/4 fluid ounces of the dressing into her salad. How much dressing remains in the jar?

Answer 1

$6 \frac{1}{2} + 2 \frac{3}{8} = \\ \frac{13}{2} + \frac{19}{8} = \\ \frac{52}{8} + \frac{19}{8} = \\ \frac{71}{8}$
$\frac{71}{8} - 2 \frac{1}{4} = \\ \frac{71}{8} - \frac{9}{4} = \\ \frac{71}{8} - \frac{18}{8} = \\ \frac{53}{8}$
$\frac{53}{8} = 6 \frac{5}{8}$