A decimal number is simply 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. A decimal representation does not require a decimal point. So the required decimal representation is 57.5, exactly as in the question. Furthermore, 57.5 is the representation of the number as a fraction. It is a fraction in decimal form rather than in the form of a ratio. However, that does not stop it being a fraction.
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decimal to fraction5.75 = 575/100 or 23/4 in fraction
Restate the question: If you can write a fraction as a decimal, can you write a decimal as a fraction?Yes.
That already is a decimal fraction.
As a fraction, you can write it as 8/10. As a decimal, you can write it as 0.8.
Obviously, it is because a rational number is any number that can be written as a fraction or decimal