`(-3)/(-7) . 14/5`
`=3/7 . 14/5`
`=(3xx14)/(7xx5)`
`=6/5`
_________________________
`(-35)/46 . 23/(-205)`
`=(-35)/46 .(-23)/205`
`=35/46 . 23/205`
`=7/82`
_______________________
`28/17 . 68/(-14)`
`=`\(\dfrac{28.68}{17.\left(-14\right)}\)
`=-8`
___________________
`8/17 . (-68)/4`
`=8/17 . (-17)`
`=`\(\dfrac{8.\left(-17\right)}{17}\)
`=-8`
\(a.\dfrac{-3}{-7}\cdot\dfrac{14}{5}=\dfrac{3}{7}\cdot\dfrac{14}{5}=\dfrac{42}{35}=\dfrac{6}{5}.\)
\(b.\dfrac{28}{17}\cdot\dfrac{68}{-14}=\dfrac{-28}{17}\cdot\dfrac{34}{7}=-8.\)
\(c.\dfrac{-35}{46}\cdot\dfrac{23}{-205}=\dfrac{35}{46}\cdot\dfrac{23}{205}=\dfrac{7}{82}.\)
\(d.\dfrac{8}{17}\cdot\left(\dfrac{-68}{4}\right)=\dfrac{8}{17}\cdot17=-\dfrac{8}{1}=-8.\)
