5427,29,3,23,3,3,2
54 27,2 9,3,2 3,3,3,2
'' 54'' '' ^'' ''6/9'' ''3-2/ 3-3''
The greatest common factor of 54 and 90 is 18.
Since 27 is a factor of 54, and 27 cannot have a larger factor than itself, the greatest common factor of 27 and 54 is 27.
5427,29,3,23,3,3,2
54 27,2 9,3,2 3,3,3,2
54 27,2 9,3,2 3,3,3,2
54 27,2 9,3,2 3,3,3,2
54 27,2 9,3,2 3,3,3,2
54 27,2 9,3,2 3,3,3,2
54 27,2 9,3,2 3,3,3,2
54 ./..\. 9......6 /..\.../.\ 3x3 2x3 3,3,2,3
54 27,2 9,3,2 3,3,3,2
54 27,2 9,3,2 3,3,3,2
54 27,2 9,3,2 3,3,3,2
Since 9 is a factor of 54, it is automatically the GCF, but if you insist...93,35427,29,3,23,3,3,2