.one_half {
    width: 48%
}

.one_third {
    width: 30.66%
}

.two_third {
    width: 65.33%
}

.one_fourth {
    width: 22%
}

.three_fourth {
    width: 74%
}

.one_fifth {
    width: 16.8%
}

.two_fifth {
    width: 37.6%
}

.three_fifth {
    width: 58.4%
}

.four_fifth {
    width: 67.2%
}

.one_sixth {
    width: 13.33%
}

.five_sixth {
    width: 82.67%
}

.one_half,
.one_third,
.two_third,
.three_fourth,
.one_fourth,
.one_fifth,
.two_fifth,
.three_fifth,
.four_fifth,
.one_sixth,
.five_sixth {
    float: left;
    margin-bottom: 1.5em;
    margin-right: 4%;
    position: relative;
}

.column-last {
    clear: right;
    margin-right: 0!important;
}

.clear {
    clear: both;
    display: block;
    font-size: 0;
    height: 0;
    line-height: 0;
    width: 100%;
}

@media only screen and (max-width: 767px) { 
	.one_half,
	.one_third,
	.two_third,
	.three_fourth,
	.one_fourth,
	.one_fifth,
	.two_fifth,
	.three_fifth,
	.four_fifth,
	.one_sixth,
	.five_sixth {
	    width: 100%;
	    margin-bottom: 0;
	    margin-right: 0;
	}
}