GIVING BRAINLIESST TO ANYONE WHO HELPS PLEASE EXPLAIN THANK U

Answer:
3:1 or 9:3
Step-by-step explanation:
It wants a ratio of larger rectangle : smaller rectangle.
All we have to do is replace the values and we get 9:3, or simplified, 3:1
Hope this helped! I would appreciate a Brainliest if you wouldn't mind!