How to do this?I'm confuse
-(7/9).
(7/8)×(-7/9-1/9)
=(7/8)×(-1×(7/9+1/9))
(7/8)×(-1)×((7+1)/9)
(7/8)×(-1)×(8/9)
(-1)×(7/8)×(8/9)
(-1)×(7/9)
=(-7/9).