Answer:
Step-by-step explanation:
(+)(+) = (+)
(-)(-) = (+)
(+)(-) = (-)(+) = (-)
8 + (-8) + a = 8 - 8 + a = a
+(-8) = -8
8 - 8 = 0
3:1
The answer in 180000 * 3 ÷ 100 = 5400$
-8.9%