`a) -9/34 . 17/4`
`=\frac{-9 . 17}{34.4}`
`=\frac{-9 . 1}{2.4}`
`= -9/8`
------------------------------
`b) -20/41 . (-4/5)`
`= \frac{-20 . (-4)}{41.5}`
`= \frac{-4. (-4)}{41.1}`
`= 16/41`
-----------------------------------
`c) -15 . 2/3`
`= \frac{-15 . 2}{3}`
`=\frac{-5 . 2}{1}`
`= -10/1`
`= -10`
-------------------------------------
`d) -5/2 : 3/4`
`= -5/2 . 4/3`
`= \frac{-5 . 4}{2 . 3}`
`= \frac{-5 . 2}{1 . 3}`
`= -10/3`
-------------------------------------
`e) 4 1/5 : ( -2 4/5)`
`= 21/5 : ( -14/5)`
`= 21/5 . (-5/14)`
`=\frac{21 . (-5)}{5 . 14}`
`= \frac{21 . (-1)}{1 . 14}`
`= -21/14`
`=-3/2`
-------------------------------------------
`g) 1 4/5 : (-3/4)`
`= 9/5 . (-4/3)`
`= \frac{9 . (-4)}{5 . 3}`
`= \frac{3 . (-4)}{5 . 1}`
`= -12/5`
