Questions on Algebra: Inverse operations for addition and multiplication, reciprocals answered by real tutors!

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Question 150617: Find the multiplicative inverse of 2.25

ok..I get that multiplicative inverse of 7 is 1/7 and 2/3 is 3/2...but I do not for some reasom get the the multiplicative inverse of 2.25!!!! Please explain thanks: Find the multiplicative inverse of 2.25

ok..I get that multiplicative inverse of 7 is 1/7 and 2/3 is 3/2...but I do not for some reasom get the the multiplicative inverse of 2.25!!!! Please explain thanks
Answer by Earlsdon(3748) About Me  (Show Source):
You can put this solution on YOUR website!
Find the multiplicative inverse of 2.25
You will first need to convert the decimal number 2.25 to an improper fraction.
2.25 = 2 1/4 = 9/4
The multiplicative inverse of 9/4 is 4/9, so...
The multiplicative inverse of 2.25 = 4/9
However, if you need your answer to be in decimal form, then...
4/9 = 0.444...
The multiplicative inverse of 2.25 = 0.444...