11
1*11=11
3*11=33
9*11=99
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It is: 99
1 x 99 = 99 99 x 1 = 99 3 x 33 = 99 33 x 3 = 99 9 x 11 = 99 11 x 9 = 99
1, 3, 9, 11, 33, 99
The GCF is 11.
To find a ninth of 99, you would divide 99 by 9. The calculation would be 99 ÷ 9 = 11. Therefore, a ninth of 99 is 11.