Final answer:
To write the statement as a rate, divide the number of full moons by the number of days.
Step-by-step explanation:
A rate is a ratio that compares two quantities with different units. In this case, we want to find the rate at which Jan saw full moons. The statement says that Jan saw 9 full moons in 252 days. To write this as a rate, we divide the number of full moons by the number of days:
Rate = Number of Full Moons / Number of Days
So the rate at which Jan saw full moons is 9/252. Simplifying this fraction gives the answer:
Rate = 1/28
Learn more about Writing rates