Find 15.909333 in the nearest tenth

The answer is 15.9 because the first decimal place is the tenths

To round to the nearest tenth you have to look at the hundredth place ... in this case 0 is in the hundredth place so you just keep the 9 in the tenth place and drop all trailing numbers ...

15.909333 to nearest tenth is:

15.9

You always look at the term after the term you want to round, if that next number is less than 5 you keep term you are rounding to, if it is 5 or greater you round up to the next number.