Step-by-step explanation: The reason why the GCF for both 27 and 15 are 3 is because, 5 x 3 = 15 and 9 x 3 = 27. Three can be multiplied by a number to get the product of 27 and 15. Three is the highest number that can be multiplied by a number to get the result of 15 and 27.
