I hope you may some suggestions

I have been using the below in a custom.css file

[custom.css]
.field-name-field-image-includes {
float: right;
clear: both;
}

however, the only way I was able to get the above to work was to remove a line from the below

[articles.css]
.node .field-type-image,
.region-content .view .views-row .views-field-field-image {
background: #fff;
float: left;
margin-bottom: 10px;
margin-right: 15px;
}

is there better way?
thank you