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The GCF of 72, 270 and 810 is: 18
45
To find 18 percent of a number, multiply the number by 0.18. In this instance, 0.18 x 4500 = 810. Therefore, 18 percent of 4500 is equal to 810.
Exactly 18 times
The number 1, 2, 3, 5, 6, 9, 10, 15, 18, 27, 30, 45, 54, 81, 90, 135, 162, 270, 405, and 810 is a factor of 810.