.one,  .one_half,  .one_third,  .two_third,  .three_fourth, 
.one_fourth{
margin-right: 4%;
float: left;
position: relative;
margin-bottom: 37px;
}
.last{
margin-right: 0 !important;
clear: right;
}
.one{
float: none;
display: block;
clear: both;
margin-right: 0;
}
.one_half{
width: 48%;
}
.one_third{
width: 30.6%;
}
.two_third{
width: 65.1332%;
}
.one_fourth{
width: 21.8%;
}
.three_fourth{
width: 73.8%;
}
.one img,  .one_half img,  .one_third img,  .two_third img, 
.three_fourth img,  .one_fourth img{
max-width: 100%;
height: auto;
max-height: 100%;
width: auto;	
}