To round 307.72 to the nearest tenth, you look at the digit in the hundredths place (which is the second digit after the decimal point).
In this case, the number is 307.72:
- The digit in the tenths place is 7.
- The digit in the hundredths place is 2.
Since 2 is less than 5, you do not round up the tenths place.
Therefore, 307.72 rounded to the nearest tenth is 307.7.