#div-1 {
position:relative;
}
#div-1a {
position:absolute;
top:0;
right:0;
width:200px;
}
<div id="div-1">
<div id="div-1a"></div>
</div>
#div-1 {
position:relative;
}
#div-1a {
position:absolute;
top:0;
right:0;
width:200px;
}
<div id="div-1">
<div id="div-1a"></div>
</div>