Div content float left 100% when a hide a module right float right Joomla

I cant solve. I have my content in a float left css with:

float: left;
    height: auto;
    margin: 0px 22px;
    clear: none;
    min-width: 66.768799%;
overflow: auto;

and my right module css

    float: right;
    height: auto;
    margin: 0px 15px 0px 0px;
    clear: none;
    width: 28.461538%;
overflow: auto;

they are inside of a wrapper

    float: none;
    height: auto;
    margin-left: auto;
    margin-top: 0px;
    clear: none;
    width: 100%;
    max-width: 1300px;
    margin-right: auto;

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