What is 1.25 as a fraction?

To express 1.25 as a fraction, it is helpful to recognize that the decimal 1.25 can be broken down into its whole number and fractional parts.

The whole number part is 1, and the decimal part, 0.25, represents a quarter or 25/100. To convert 0.25 into a fraction, it can be simplified: 25/100 reduces to 1/4 when both the numerator and denominator are divided by 25.

Now, when combining the whole number and the fraction, 1 can be expressed as 4/4 in terms of quarters. Therefore, when you add this to 1/4, you have:

1 + 0.25 = 4/4 + 1/4 = 5/4.

Thus, 1.25 as a fraction is indeed 5/4, which confirms the correct answer.