Divide : (i)`(-7)/8b y(-21)/(16)` (ii) `7/(-4)b y(63)/(64)` (iii) `0\ b y(-7)/5`

Explanation

(i) `(-7)/8by(-21)/16`
`=-7/8-:(-21)/16`
`=7/8xx16/21`
`=2/3`
(ii)`7/(-4)by63/64`
`=7/(-4)-:63/64`
`=-7/4xx64/63`
`=-2`
(iii)`0by-7/5`
`=0xx-5/7`
`=0`