Question

Is negative 5.7 a rational number?

Answer 1

Yes, it is.

Explanation:

A rational number is a number, which can be described as a ratio of two integers. As it is a ratio of integers, it can be positive as well as negative.

Further, any decimal fraction, which limits itself beyond the decimal point (such as `5.7` which does not go beyond tenth place) or has continuously repeats numbers (till infinity) beyond a certain place of decimal (such as `4.33333....` or `0.232142857142857142857....`) can be easily written as ratio of integers, however large and hence are rational.

Now as `-5.7=-57/10=(-57)/10`, a ratio of two integers, it is a rational number.