-4/1
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3.75
Rational.
Yes. All mixed numbers can be converted into improper fractions where there is one integer over another (non-zero) integer which is the form of a rational number. 3 1/4 = (3×4+1)/4 = 13/4
Yes. It's the ratio of -144 and 4. That makes it a rational number by definition.
It is -4/1.