Final answer:
The improper fraction in the given options is Start Fraction 25 over 20 End Fraction.
Step-by-step explanation:
An improper fraction is a fraction where the numerator is equal to or greater than the denominator. In this case, the only option that fits this criteria is Start Fraction 25 over 20 End Fraction.
The numerator, 25, is greater than the denominator, 20, making it an improper fraction.