.interactive-row {width: 100%; clear: both;}
.column-2 {width: 16.6%; float: left;}
.column-4 {width: 25%; float: left;}
.column-6 {width: 50%; float: left;}
.column-8 {width: 66.6%; float: left;}
.column-9 {width: 75%; float: left;}
.column-12 {width: 100%;}