No rounding is necessary - the number is already rounded to one decimal place.
1.9
Rounded to one decimal place, 4.98 is approximately equal to 5.0.
If you are trying to round 376.99 to 1 decimal point, the answer is 377.0
The '9' is in the "first decimal" place and the '3' is in the "second decimal" place. Rules for rounding If the number in the second decimal place is 5 or greater then the number in the first decimal...