What is 1.125 as a fraction?

As a fraction, 1.125 can be written as 9/8. To convert a decimal to a fraction, you can simply rewrite the decimal as the numerator and then choose a denominator that is a power of 10 equal to the number of decimal places. In this case, there are 3 decimal places, so the denominator is 10^3 = 1000. Simplifying 1125/1000 gives us 9/8.