To round to the nearest tenth of a number, you must determine if the current tenth or the next tenth is closest (less than 5 hundredths).
An example:
4.3946
Here, the three is the tenths place and the 9 is the hundredths place. The number is about nine hundredths away from being 4.3, but it is less than one hundredth away from being 4.4, so rounding to the nearest hundredth means rounding up to 4.4 in this case.
There is only one exception to that case, and that is if the hundredths place is a five. It is standard convention to round up in this case, always.
It is then 19.1 to the nearest tenths
It is 17.9 to the nearest tenths
8.96 to the nearest tenths is 9.0
2.45 to the nearest tenths is 2.5
36.16666 to the nearest tenths is 36.2
53.6585 to the nearest tenths is 53.7
4.916 to the nearest tenths is 4.9
17.899 to the nearest tenths is 17.9
52 to the nearest tenths is 52.0
17.56 to the nearest tenths is 17.6
298.3060 to the nearest tenths is 298.3
116 to the nearest tenths is 116.0