.one_half,.one_third,.two_third,.one_quarter,.two_quarter,.three_quarter,.one_fifth,.two_fifth,.three_fifth,.four_fifth{display:inline-block;float:left;margin:0 0 0 20px;list-style:none;}


.one_third,.two_third{margin:0 0 0 30px;}


.first,.one_half:first-child,.one_third:first-child,.two_third:first-child,.one_quarter:first-child,.two_quarter:first-child,.three_quarter:first-child,.one_fifth:first-child,.two_fifth:first-child,.three_fifth:first-child,.four_fifth:first-child{margin-left:0;}

.two_half,.three_third,.four_quarter,.five_fifth{display:block;width:100%;clear:both;}
.one_half{width:510px;}
.one_third{width:300px;}
.two_third{width:630px;}

.one_quarter{width:225px;}.two_quarter{width:470px;}.three_quarter{width:715px;}.one_fifth{width:176px;}.two_fifth{width:372px;}.three_fifth{width:568px;}

.four_fifth{width:764px;}