How can I mixin a style that doesn't begin with a class or ID into another style?

```
[class*='col-'] {
 float: left;
 padding-right: 20px;
 @media @medium{
 padding-right: 0px;
 }
}

.col-2-3 {
 width: 66.66%;
 [class*='col-']  
} 

```