It is 40/9.
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4 and 2/9 as an improper fraction is 38/9
36/9 = 4
The mixed number 2 1/4 (two and one over four) = 9/4 (nine over four) as an improper fraction.
Conversion of 4.5 to a fraction gives 4 1/2.Conversion of 4 1/2 to an improper fraction yields 9/2
Convert the decimal 4.5 to a fraction 4 1/2 As an Improper Fraction 4 1/2 = 9/2