Louise is playing a game, but the spinner is incomplete. each section of the spinner is labeled with the probability of spinning it. what fraction is missing

1/10 is missing as if u turn all the other fractions into decimals u will see that they all equal to 0.9 so the last bit must be 0.1 which is 1/10

u can also add the fractions
so u have to change the denominator so that all their denominator is the same using the cross method 

1/3 +1/6

6/18+3/18

=9/18

=1/2

1/2+2/5

=5/10+4/10

=9/10 

So the missing part is 1/10

The percent discount was 120