When rounding to the nearest tenth (or other fraction), you always look at the next number. Here, in 15.992 the next number is 9 (second place after decimal point), therefore it rounds up. As the next number (first place after decimal point) is also 9, this also rounds up, giving the result of 16.0.
(If the number to round would be for example 15.945, the result rounded to the nearest tenth would be 15.9)
The nearest tenth is 0.5
It is 0.4 to the nearest tenth
what is 0.74 to the nearest tenth
It is 2.1 to the nearest tenth
38.46 is 38.5 to the nearest tenth. 1.2 is already at the nearest tenth
3.9356 to the nearest tenth is 3.9
A tenth of 0.44 is 0.044. The nearest tenth to it is zero. 0.44 rounded to the nearest tenth is 0.4 .
It is 1.0 to the nearest tenth and not 0.9
It is already to the nearest tenth as 3.2
The nearest tenth is 0.5
It is 0.4 to the nearest tenth
what is 0.74 to the nearest tenth
It is 2.1 to the nearest tenth
To the nearest tenth.... 7.7
It is 6.9 to the nearest tenth
what is 28.4 to the nearest tenth
It is already to the nearest tenth