Answer: 1:2
Explanation:
We know that in mathematics , the ratio of m to n is written as
or m:n [In simplified terms]
Similarly, for the given question , the ratio of 3 sailboats to 6 fan boats will be written as :

Divide both numerator and denominator by 3 [∵ both 3 and 6 are multiple of 3], we get

Hence, the ratio of 3 sailboats to 6 fan boats will be 1:2.