1.5
These are rational number that are not integers. In their simplest form, they are of the form a/b where a and b are integers and b is not 0 nor 1.
If there is no common factor other than 1 in a rational expression, it is in simplest terms or form.
You will know because there are no other numbers that can go into both the numerator and denominator.
There is nothing that you can conclude.They could be recurring decimals or terminating decimals [as rational numbers, there is no other form].They may or may not be in their simplified or reduced form: for example 14/7 is a rational number with a prime denominator but it can be simplified.
1.8 is in its simplest form. The simplest from, as a rational fraction, is 9/5.
Rational numbers form a proper subset of real numbers. So all rational numbers are real numbers but all real numbers are not rational.
They are numbers which are written in the form p/q where p and q are integers.
A whole number is a number is a rational number which, in its simplest form has 1 as divisor. All other numbers are not whole number.
The real numbers.
The set of Real numbers.
Rational numbers are numbers which can be written in the form p/q where p and q are integers and q > 0. Rationals is often used as an abbreviation to refer to the set of all rational numbers.
2.105 is probably the simplest. However, if you want the simplest rational form, it is 421/200.