Answer:
7.3 (I'm not exactly sure.)
Explanation:
21.900 - 0 = 21 - 21 = 09 - 9 - 0 - 0 = 0 - 0 = 0
7.300 (rounding, estimated) 7.3
Writer's note: i wasn't sure how the estimation.
[xArtsy]
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