2810000 is already rounded to the nearest tenth. If you need to show that it is rounded to the nearest tenth you would need to write it as 2810000.0
56.88 in percent expressed to the nearest tenth = 5688.0%
1105.8
201.1
17.0
It is: 0.9
0.5
0.2
8.4%
5.4
It is: 0.9
12.5 percent is already round to the nearest tenth of a percent.