Final answer:
The fraction representation of 2.5% is 1/40, which is Option 2 in the list.
Step-by-step explanation:
To express 2.5% as a fraction, we first write 2.5% as a decimal, which is 0.025. To convert this decimal into a fraction, we can think of it as 2.5 over 100, since percent means 'per one hundred.' This can be further simplified by dividing both the numerator and the denominator by 2.5, giving us 1 over 40. Therefore, the fraction representation of 2.5% is 1/40, which corresponds to Option 2 in your list of possible answers.