►Frac attempts to display the input in fraction form. It only works on the home screen outside a program, or with the Disp and Pause commands in a program. It takes at least 12 decimal places of a non-terminating decimal to find the corresponding fraction. The decimal input is returned if ►Frac fails to find the fraction form.
For a better algorithm for finding fractions, see the Decimal to Fraction routine.
.333►Frac .333 .333333333333►Frac 1/3