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Subset
A decimal number is a way of representing numbers so that the place value of any digit is ten times that of the digit to its right. You can have whole numbers in binary, octal, hexadecimal etc bases. A decimal number may or may not have a fractional part. A whole number cannot have a fractional part.
2.45 is a fraction and there is no way to represent it as a whole number. The whole part of it is 2.
A fraction.
A fraction or ratio.
Subset
a number that names a part of a whole or part of a group
A fraction is a way of representing a division of a 'whole' into 'parts'.
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. So the quality of being a decimal pervades the whole number, not just a part of it.
a. a shorthand way of representing the chemical elements.
A decimal number is a way of representing numbers so that the place value of any digit is ten times that of the digit to its right. You can have whole numbers in binary, octal, hexadecimal etc bases. A decimal number may or may not have a fractional part. A whole number cannot have a fractional part.
Any of them. 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, nor does it require a fractional part.
local group
810.4 is a fraction and there is no way to represent it as a whole number. The whole part of it is 810.
2.45 is a fraction and there is no way to represent it as a whole number. The whole part of it is 2.
A fraction or ratio.
A fraction.