What is the common ratio of - 3,15,-45,225

This does not have a common ratio

Step-by-step explanation:

To find the common ratio, take the second term and divide by the first term

15 / - 3 = - 5

The common ratio is - 5

Verify by taking the third term and divide by the second term

-45/15 = - 3

These numbers are not the same, so there is not a common ratio