Explanation:
To get the Greates Common Factor (GCF) of 135000 and 54000 we need to factor each value first and then we choose all the copies of factors and multiply them:
135000: 2 2 2 3 3 3 5 5 5 5
54000: 2 2 2 2 3 3 3 5 5 5
GCF: 2 2 2 3 3 3 5 5 5
The Greates Common Factor (GCF) is: 2 x 2 x 2 x 3 x 3 x 3 x 5 x 5 x 5 = 27000