is -0.4 a rational number

Answer 1

Yes, -0.4 is a rational number. A rational number is any number that can be expressed as the quotient of two integers, where the denominator is not zero. In this case, -0.4 can be expressed as $-\frac{4}{10}$, which simplifies to $-\frac{2}{5}$. Since both -2 and 5 are integers, -0.4 is indeed a rational number.