.one-half{
    width: 50%;
}

.one-third{
    width: 33.33%;
}

.two-third{
    width: 66.66%;
}

.one-fourth{
    width: 25%;
}

.three-fourth{
    width: 75%;
}

.one-fifth{
    width: 20%;
}

.two-fifth{
    width: 40%;
}

.three-fifth{
    width: 60%;
}

.one-sixth{
    width: 16.66%;
}

.one-half,.one-third,.two-third,.three-fourth,.one-fourth,.two-fifth,.three-fifth,.one-sixth,.five-sixth {
    float: left;
    min-height: 30px;
    padding-left: 20px;
    padding-right: 20px;
}

@media only screen and (max-width: 768px) and (max-width: 1200px)  {
    .center-box {
        width: 100%!important;
        padding-left: 20px;
        padding-right: 20px;
    }
}

@media only screen and (max-width: 768px)  {
    .center-box {
        width: 100%;
        padding-left: 20px;
        padding-right: 20px;
    }

    .one-half,.one-third,.two-third,.three-fourth,.one-fourth,.two-fifth,.three-fifth,.one-sixth,.five-sixth {
        position: relative;
        float: none;
        width: 100%;
    }
}