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1/9 of 81 is 9
1/81
5/9 of 81 is 45.
(81 ÷ 9) × 2 = 18
It is: 9*9 = 81
1/9 of 81 is 9.
One-ninth
It is 81 because 9 times 9 equals 81
-1/9 x 1/9 = -1/81
9
81
81 144
9= 1/9 * 81= 81/9= 9