The greatest common factor of 210 and 90 is 30
To solve this we first need to list all of the copies that they have with each other and multiply them.
210: 23 57
90: 2335
GCF: 23 5
Now that we found our GCF we need to multiply them together
2 ✖️3✖️5 = 30
Therefore 30 is the correct answer
Hope this helps! :3
