First, it's important to add the two given numbers together. In our case, the two numbers are 9.3478 and 2.73. When added together, the sum amounts to 12.0778.
However, the question asks for the answer rounded to the hundredths place. In order to round a number to the hundredths place, we look at the digit in the thousandths place. In the number 12.0778, the digit in the thousandths place is 7. If this digit is 5 or more, we round up. If it is less than 5, we keep the number in the hundredths place the same.
Since the digit in the thousandths place is 7, we round up. Thus, when rounded to the hundredths place, the sum of 9.3478 and 2.73 is 12.08.