A calculator manufacturing company checks 500 calculator units, and 25 of them have non-functioning keys. Approximate the relative frequency of a non-defective unit from this batch of items. Express your answer in the simplest form of a fraction.(1 point) Responses 120 Start Fraction 1 over 20 End Fraction 475500 Start Fraction 475 over 500 End Fraction 25500 Start Fraction 25 over 500 End Fraction 1920