Table:
text: Twenty-eighth Amendment of the Constitution of Ireland
By constituency
Result by constituency
Constituency Electorate s_Spoilt_vote Total_poll_ For_ Against_ _Yes_side_2008_
Donegal South–West 60340 127 31,417 (52.3) 15,623 (49.7) 15,794 (50.3) +13.1
Dublin Central 56451 147 29,941 (53.3) 18,545 (61.9) 11,396 (38.1) +18.1
Dublin Mid–West 62651 104 34,859 (55.8) 21,435 (61.5) 13,424 (38.5) +21.9
Dublin North 83251 193 50,866 (61.3) 36,971 (72.7) 13,895 (27.3) +22.1
Dublin North–Central 50946 105 33,316 (65.6) 23,692 (71.1) 9,624 (28.9) +20.5
Dublin North–East 52499 135 33,162 (63.4) 21,045 (63.5) 12,117 (36.5) +20.3
Dublin North–West 49813 114 28,584 (57.6) 15,734 (55.0) 12,850 (45.0) +18.6
Dublin South 98225 191 58,221 (59.5) 47,549 (81.7) 10,672 (18.3) +18.8
Dublin South–Central 80756 214 44,596 (55.5) 25,854 (58.0) 18,742 (42.0) +19.0
Dublin South–East 54794 127 29,843 (54.7) 23,478 (78.7) 6,365 (21.3) +17.0

Question: What is the ± yes side of the 2008 Twenty-Eighth Amendment to the Irish Constitution when +18.1 is the percentage of against?

Question: From the Twenty-Eighth Amendment to the Irish Constitution, if +20.3 is the ± yes side 2008 (%) what is the percentage for ?