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.
It is rational, whole, integer and real but not natural nor irrational.
3 is natural number, a whole number, an integer, a terminating decimal, and a rational number. It is not an irrational number.
-13 is rational and an integer.
rational
3.5 is real, rational, and natural. It's not irrational, integer, or whole.
It is real, rational but not the others.
-15 is a rational integer whole number
It is -3, which is an integer
5 over 8 is a rational number.
Rational, whole and integer. Some mathematicians consider it a natural number, others do not.
45 is real, rational, whole, natural, odd, composite, and an integer.
5 is a natural number, as it is an integer greater than zero. It is a whole number, an integer, and a rational number.