Final answer:
To write the ratio as a fraction, first convert the decimals to the same units, then simplify if necessary.
Step-by-step explanation:
To write the ratio as a fraction, we need to convert both numbers to the same units. In this case, we can multiply 0.03 and 0.15 by 100 to convert them to percentages. This gives us a ratio of 3 to 15. Remember that the ratio can be simplified by dividing both numerator and denominator by their greatest common factor, which in this case is 3. So, the simplified ratio is 1 to 5.
Learn more about Converting ratios from decimals to fractions