Add and Subtract Unlike Fractions Practice Test

Two pitchers each hold the same 1-liter whole (fractions must refer to the same-sized whole). One pitcher has $\frac{7}{8}$ liter of juice. Another has $\frac{1}{3}$ liter of juice. A student writes equivalent fractions: $\frac{7}{8}=\frac{21}{24}$ and $\frac{1}{3}=\frac{8}{24}$. What is the difference $\frac{7}{8}-\frac{1}{3}$ liters?

Two students are measuring the same 1-yard strip of fabric (fractions must refer to the same-sized whole). One student used $\frac{5}{6}$ yard. The other student used $\frac{1}{4}$ yard. They find equivalent fractions: $\frac{5}{6}=\frac{10}{12}$ and $\frac{1}{4}=\frac{3}{12}$. What is the difference $\frac{5}{6}-\frac{1}{4}$?