Final answer:
The decimal 3.03 can be written as the fraction 303/100, which is already in its simplest form as there are no common factors to simplify.
Step-by-step explanation:
Converting the decimal 3.03 to a fraction involves the understanding of place values. The digit '3' after the decimal point is in the hundredth place, so we can write this number as 303 hundredths.
In fraction form, we express this as 303/100. To reduce this fraction to the lowest terms, we observe that 303 and 100 have no common factors other than 1, so the fraction in its simplest form is still 303/100.