\(=\dfrac{9}{680}:\dfrac{-3}{7}=\dfrac{-21}{680}\)
\(\left(2.\dfrac{2}{15}.\dfrac{9}{17}.\dfrac{3}{32}\right):\left(\dfrac{-3}{7}\right)\)
\(=\dfrac{9}{680}:\left(\dfrac{-3}{7}\right)\)
\(=\dfrac{9}{680}\cdot\left(-\dfrac{7}{3}\right)\)
\(=-\dfrac{21}{680}\)
\(\left(2.\dfrac{2}{15}.\dfrac{9}{17}.\dfrac{3}{32}\right):\left(-\dfrac{3}{7}\right)\)
\(=\dfrac{9}{680}:\left(-\dfrac{3}{7}\right)\)
\(=-\dfrac{21}{680}\)
( 2.2/15.9/17.3/32 ) : ( -3/7 ) = -21/680