If you only have two or three percentages you could use something hideous like this, it does the trick though.
=IF(AND(MID(A1,(FIND(".",A1)+3),3)>MID(A2,(FIND(".",A2)+3),3),MID(A1,(FIND(".",A1)+3),3)>MID(A3,(FIND(".",A3)+3),3)),ROUND(A1,2)+0.01,ROUND(A1,2))
=IF(AND(MID(A2,(FIND(".",A2)+3),3)>MID(A1,(FIND(".",A1)+3),3),MID(A2,(FIND(".",A2)+3),3)>MID(A3,(FIND(".",A3)+3),3)),ROUND(A2,2)+0.01,ROUND(A2,2))
=IF(AND(MID(A3,(FIND(".",A3)+3),3)>MID(A1,(FIND(".",A1)+3),3),MID(A3,(FIND(".",A3)+3),3)>MID(A2,(FIND(".",A2)+3),3)),ROUND(A3,2)+0.01,ROUND(A3,2))
I wouldn't normally post something like this, but it took me so long I just had to.