Find the common ratio of the infinite geometric series: 
    (-3)/5-5/3-125/27-…

The common ratio of the given infinite geometric series is 25/9.
Complete the following task based on the instruction and optional input provided.### Instruction:
Find the common ratio of the infinite geometric series: 
    (-3)/5-5/3-125/27-…


### Output:
The common ratio of the given infinite geometric series is 25/9.