Yes, it is.
Yes.
-7 is a rational number because it can be expressed as a fraction in the form of -7/1
Yes. Any number that can be expressed as a fraction or a ratio is a rational number. Seven is a rational number because it can be expressed as 7/1.
Yes.
no
Yes.
No.
The answer depends on seven over WHAT!
7/8 is a rational number because rational numbers are fractions, numbers that terminate, numbers that repeat.
37 can be written as 37/1 which is a number of the from a/b where a and b are integers. This shows it is rational.
4.7 is already a rational number. If you mean as a mixed number, this is equal to 4 7/10 or four and seven tenths.
Yes - any number that can be expressed as a fraction, or ratio, including 1/7, is a rational number.