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How to do this?I'm confuse

Subject
Topic
Level
Highschool
Grade
9

Answer

-(7/9).

Steps

(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).

 

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