Answer:
5
Step-by-step explanation:
The GCF of 25 and 45 is 5. To calculate the greatest common factor (GCF) of 25 and 45, we need to factor each number (factors of 25 = 1, 5, 25; factors of 45 = 1, 3, 5, 9, 15, 45) and choose the greatest factor that exactly divides both 25 and 45, i.e., 5.
