Answer:
10%
Step-by-step explanation:
divide 90 into 81
so 81/90=.9
multiply that by 100 and you get 90 so 81 is 90% of 90 so it got marked down 10%
1.3
1. .65 = .5c ---> .65/.5
2. 1.3 = c
-3.25 Didn't see the whole paper so correct me if I'm wrong.
−2.5+0.25+−1.25+−1.5
+1.25+0.5=-3.25