Rounding 2.079404467 to 1 decimal place means keeping only one digit after the decimal point.
Looking at the second digit after the decimal point, which is 7, we see that it is greater than or equal to 5. Therefore, we round up the first digit after the decimal point, which is 9, by adding 1 to it.
So, rounding 2.079404467 to 1 decimal place, we get:
2.1
Therefore, 2.079404467 to 1 decimal place is equal to 2.1.