To find the greatest common factor (GCF) of 30 and 75, we can list the factors of each number:
Factors of 30:
1, 2, 3, 5, 6, 10, 15, 30
Factors of 75:
1, 3, 5, 15, 25, 75
Now, we identify the common factors:
- Common factors: 1, 3, 5, 15
The greatest of these common factors is 15.
Thus, the GCF of 30 and 75 is 15.