Final answer:
By comparing the numbers at each decimal place, it's determined that 30.30 is greater than 30.03 because '30' in the hundredths place is greater than '03'.
Step-by-step explanation:
To determine which number is greater between 30.30 and 30.03, we should look at the digits from left to right and compare them at each decimal place. Both numbers have a '30' before the decimal point, making them equal up to this point. Comparing the decimal places, we have '30' in the hundredths place for 30.30 and '03' in the hundredths place for 30.03. Since '30' is greater than '03', we conclude that 30.30 is greater than 30.03.