The Charter may be amended as provided in Article XVIII, Section 9, of the Constitution of Ohio, by the submission of the proposed amendments to the electors of the City.
   If any such amendment is approved by a majority of the electors voting thereon, it shall become a part of this Charter, except that if two or more inconsistent proposed amendments on the same subject shall be submitted at the same election, only the one of such amendments receiving the highest number of affirmative votes, not less than a majority, shall become a part of this Charter.