How to right align fixed position div inside a div

Question

My code is like this.

    
some text here
    

CSS:

Answer 1

Why don't you use position:absolute

position:fixed always relative to the browser

.outer {
    width:200px;
    height:600px;
    background-color:red;
    margin:0 auto;
    position:relative
}
.inner {
    width:50px;
    border:1px solid white;
    position:absolute; right:0
}

DEMO

---

If it is compulsory to use position:fixed then you can assign the margin-left value, since you are using fixed with for both the divs.

.inner {
    width:50px;
    border:1px solid white;
    position:fixed; margin-left:150px
}

DEMO 2