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6.1
Rounded to the nearest tenth, there can be only one decimal. And that is 7.8
9.97 rounded to the nearest tenth is 10.0. Since the hundredths place (7) is 5 or greater, you round up the tenths place (9) by one. Therefore, 9.9 becomes 10.0 when rounded to the nearest tenth.
33.3%
8.7