Answer:
5/18
Explanation:
first you want to flip 2/5 to 5/2 and change the division sign to multiplication so it would look like 1/9 x 5/2
then multiply 1 and 5 then 9 and 2 so the top and bottom to get 5/18
side note: but if it were 1/9 x 3/7 you would change the 3 to a 1 and the 9 to a 3 because they multiply so ask yourself how many times does three go into 9 so it would be 1/3 x 1/7= 1/21
hope this helped :) also what math are you taking bc if it is under algebra 1 or something i can help with any questions you have just message me and ill be happy to help :)