whoch is greatest 9.9 , 9.09 , or 9.990 explain
9.990 is the greatest because 9.9 would have all 0's after it so it would be 9.90 which is less than 9.99 and 9.09 is less that 9.990.
9.99 > 9.9 > 9.099.99 is greater than 9.9 because 9.99 is greater than 9.9 by 0.09