Let's order the numbers from greatest to least for each group.
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Group 1: 28.4, 428, 2.48, 482, 248, 24.8, 284
- Ordered: 482, 428, 284, 248, 28.4, 24.8, 2.48
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Group 2: -0.72, -0.61, -0.1, -0.84, -0.55, -0.8, -0.7
- Ordered: -0.1, -0.55, -0.61, -0.7, -0.72, -0.8, -0.84
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Group 3: 12.1, 11.22, 11.2, 12.11, 12.01, 12, 11.21
- Ordered: 12.11, 12.1, 12.01, 12, 11.22, 11.21, 11.2
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Group 4: 7, -3, 14, -44, 21, 4, -97
- Ordered: 21, 14, 7, 4, -3, -44, -97
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Group 5: -96, -9.26, -90, -9.2, -9.6, -96.2, -92
- Ordered: -9.2, -9.26, -9.6, -90, -92, -96, -96.2
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Group 6: 9.88, 9.8, 9.9, 9.08, 9.99, 9.89, 9.09
- Ordered: 9.99, 9.9, 9.89, 9.88, 9.8, 9.09, 9.08
Now each group is sorted from greatest to least value!