For other situations a slightly different approach might also be useful.
Select the vert you want to move
Scale | Uniform > (use RMB / MMB option - choose point to scale from)
Select vert on the other end of the relevant edge
Drag as required (eyeball info readout top left for % travelled)
Accept when vert in correct position.
Why use this instead of move?
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If you hold shift during this op. wings will constrain the ‘step’ to 100% steps - so it’s very easy to get the vert being moved exactly on top of the ‘destination’ vert. Doing this, then selecting whole object and applying Object | Cleanup will effectively ‘fuse’ the 2 verts into one.
This is similar to the Edge | Collapse command - but with a difference, as the new ‘fused’ vert is at one end of the edge, rather than the middle (as in Collapse)
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There may be situations where you want to move a vert a % of the edge length, rather than a linear amount - as with move. (Holding Cntrl, btw when using scale, constrains to 10% steps, Cntrl + Shift, 1% steps.
Also, well worth investigating the Edge | Slide command - if you want to slide more than one vert which share common edges.
The shift / cntrl keys can be used to constrain all relevant commands, btw.
pp