Answer:
16. 3:9 = 9:27
17. 2:7 = 6:21
18. 33:27 = 11:27
19. 7:2 = 14:4
20. 5:7 = 25:35
21. 17:10 = 34:20
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Answer:
16. 3:9 = 9:27
17. 2:7 = 6:21
18. 33:27 = 11:27
19. 7:2 = 14:4
20. 5:7 = 25:35
21. 17:10 = 34:20