9/35 x 7/16 x 20/21 =show work
\(\frac{9}{35}\cdot\frac{ ot7^1}{16}\cdot\frac{20}{ ot21_3}=\frac{9}{35}\cdot\frac{1}{ ot16_4}\cdot\frac{ ot20^5}{3}=\frac{ ot9^3}{35}\cdot\frac{1}{4}\cdot\frac{5}{ ot3_1}=\frac{3}{ ot35_7}\cdot\frac{1}{4}\cdot\frac{ ot5^1}{1}\\\\=\frac{3}{7}\cdot\frac{1}{4}\cdot\frac{1}{1}=\frac{3\cdot1\cdot1}{7\cdot4\cdot1}=\frac{3}{28}\)