How do you know what solfege a note is if the starting note is above it?

To determine the solfege of a note when starting from a higher note, first identify the interval between the two notes. Count the scale degrees down from the starting note to the target note. For example, if the starting note is "Do" and you move down to "La," you would count down: "Do" (1), "Ti" (2), "La" (3), thus identifying "La" as the solfege for the lower note. Additionally, using a piano or a visual representation of a scale can help reinforce this process.