Question

Determine if -81.42 is rational or irrational. If it is rational, write the number as a ratio of two integers.​

Answer 1

Answer: It is a rational number.

A rational number is a number that can be represented as a fraction.

The fraction can be:
`- (4071)/(50)` because:

`-(81.42)/(100)` ÷ 2 =
`(40.71)/(50)`

The answer is yes, it is rational.

Answer 2

-81.42 is a rational number

Explanation:

`- 81.42 \\ \\ = - (8142)/(100) \\ \\ = - (8142 / 2)/(100 / 2) \\ \\ = - (4071)/(50) \\ \\`