What is .3125 as a fraction?

As a fraction, 0.3125 can be written as 5/16. This is because the decimal can be read as five-thousandths, which is equivalent to five divided by one thousand, or 5/1000. Simplifying this fraction yields 1/200, and further simplifying by dividing both the numerator and denominator by 5 gives the final form of 5/16.