A certain fraction has the same ratio to 1/18, as 2/5 does to 2/9. What is this certain fraction?
Choose the correct choice from the following answers:
A) 1/5
B) 1/7
C) 1/10
D) 1/12
E) 1/15
x / (1/18) = (2/5) / (2/9)   x = 2*9*1 / 18*5*2 = 1/10   The answer is 1/10.
<result>C</result>
A certain fraction has the same ratio to 1/18, as 2/5 does to 2/9. What is this certain fraction?