OK, this was a teaser but it worked...

=MID(A3,MAX(ROW(INDIRECT("1:"&LEN(A3)))*(MID(A3,RO W(INDIRECT("1:"&LEN(A3))),1)="
")*(ROW(INDIRECT("1:"&LEN(A3)))<FIND("%",A3)))+1,F IND("%",A3)-MAX(ROW(INDIRECT("1:"&LEN(A3)))*(MID(A3,ROW(INDIRE CT("1:"&LEN(A3))),1)="
")*(ROW(INDIRECT("1:"&LEN(A3)))<FIND("%",A3))) )

This is an array formula, i.e. you need to confirm it with
Shift+Ctrl+Enter. It assumes that there will be a space before the
percentage starts. It also assumes that you have one percentage in the
string or that you want to extract the first percentage.

HTH
Kostis Vezerides