Answer:
20. 81 blue cars
21. 54 cars
22. 15% green and 10% black
Explanation:
20. 180 x .45 = 81
21. 180 x .30 = 54
22. 180 x .25= 45 (there are 45 black and green cars)
(not super sure about this one)
if there are 27 green cars there are 18 black cars
27/180= 15%
18/180= 10%