The linked cell will move a minimum of the value one at a time. What
you need to do is to have another cell equated to one-hundreth of the
linked cell or some value plus one-hundreth of the linked cell value.
Similarly for the one-tenth situation, have another cell equal to
one-tenth of the linked cell. Then each adjustment of one on the
spinner will cause an adjustment of 0.1 in the linked cell, (or .01 in
the the percentage case).