Question #ab38b

1 Answer
Jul 8, 2017

#-1#

Explanation:

Any number divided by itself is equal to #1#.

#8/8 =1, " or "15/15 = 1# and so on.

In this case we have # 9/-9 = 9 div (-9)#
A positive value divided by a negative will give a negative answer.

So we have: #9/-9 = -9/9 = -1#