\(\cfrac{8}{9}\times\cfrac{5}{12}\)

\(\cfrac{3}{4}\times\cfrac{16}{21}\)

\(\cfrac{15}{20}\times\cfrac{2}{5}\)

\(\cfrac{9}{18}\times\cfrac{2}{3}\)

\(\cfrac{3}{4}\times\cfrac{7}{30}\)

\(\cfrac{8}{15}\times\cfrac{15}{32}\)

\(\cfrac{12}{21}\times\cfrac{7}{9}\)

\(\cfrac{18}{22}\times\cfrac{8}{9}\)

Amber has a \(\cfrac{4}{5}\)-pound bag of colored sand. She uses \(\cfrac{1}{2}\) of the bag for an art project. How much sand does she use for the project?

Tyler has \(\cfrac{3}{4}\) month to write a book report. He finished the report in \(\cfrac{2}{3}\) that time. How much time did it take Tyler to write the report?

Show two ways to multiply \(\cfrac{2}{15}\times\cfrac{3}{20}\). Then tell which way is easier and justify your choice.