There is no improper fraction which is equal to 1, and the decimal is simply 1, as in the question.
A decimal is a way of representing a number in such a way that the place value of each digit is ten times that of the digit to its right. Not all numbers require a decimal point and it is wrong to add 0s after the decimal point because they imply a degree of accuracy (significant figures) for which there is no justification.
It is equivalent decimal is 4.0540 or as an improper fraction in its lowest terms 2027/500
A mixed number.
To find an equivalent fraction for 32.029, we convert it to a mixed number. It becomes 32 and 29/1000. To find a fraction, we can multiply the decimal portion by 1000, so the equivalent fraction is 3229/1000.
The number 3.25 is already a decimal. As a mixed fraction it is 3 1/4, and 13/4 as an improper fraction.
0.06 is the decimal fraction equivalent to 6/100. As a mixed number then 6.06 = 66/100. As an improper fraction then 6.06 = 606/100.