Floating child div to fill only remaining space - html

Question

I want that yellow box to fill all the available space both vertically and horizontally without overlaying the picture.
(I'm trying to do it without using table properties)
Any ideas?
This is how it looks now:
and this is what i want:
.content-block-body{
width: 100%;
background-color: brown;
overflow:auto;
}
.content-block-text{
float:left;
background-color: red;
padding:2%;
}
.content-block-image{
background-color: greenyellow;
float: right;
}
<div class="content-block-body">
<div class="content-block-text">
<div>月額固定と成果報酬が選べます</div>
<div>成果報酬額に上限おもうけられます</div>
<div>料金が明瞭で予算に合わせた対策が可能</div>
</div>
<div class="content-block-image"> <img src="image-1.jpg"> </div>
</div>

Answer 1

The problem is the float: left makes the yellow area not "stretch." To make the image float to the right of the text, it has to come before the text. So we change the order of the content blocks:
<div class="content-block-body">
<div class="content-block-image"> <img src="image-1.jpg"> </div>
<div class="content-block-text">
<div>月額固定と成果報酬が選べます</div>
<div>成果報酬額に上限おもうけられます</div>
<div>料金が明瞭で予算に合わせた対策が可能</div>
</div>
</div>
And then adjust the css:
.content-block-body {
width: 100%;
background-color: brown;
overflow:auto;
}
.content-block-text{
/*float:left;*/ /* this we remove */
background-color: red;
padding:2%;
/* this we add: */
overflow: auto;
}
.content-block-image{
background-color: greenyellow;
float: right;
}
Note that whenever you float things you'll most likely need to add what's called a "clearfix". In this case, apply the clearfix to the .content-block-body to make it extend vertically to fit the floated element http://nicolasgallagher.com/micro-clearfix-hack/

Answer 2

You have to specify width of left block and right block in CSS and make image width 100%
.content-block-body{
width: 100%;
background-color: brown;
overflow:auto;
}
.content-block-text{
float:left;
background-color: yellow;
padding:2%;
width:56%;
}
.content-block-image{
background-color: greenyellow;
float: right;
min-width:200px;
width:40%;
}
.content-block-image img{
width:100%;
}
<div class="content-block-body">
<div class="content-block-text">
<div>月額固定と成果報酬が選べます</div>
<div>成果報酬額に上限おもうけられます</div>
<div>料金が明瞭で予算に合わせた対策が可能</div>
</div>
<div class="content-block-image"> <img src="image-1.jpg"> </div>
</div>

Answer 3

You can use css3 flex. That's the only thing that works just fine when it comes to getting the height of the parent node for child node. All the hacks for old browsers doesn't work always.
.content-block-body{
width: 100%;
background-color: brown;
overflow:auto;
display: flex;
clear: both;
}
.content-block-text{
float:left;
background-color: red;
align-items: stretch;
}
.content-block-image{
flex: 1;
background-color: greenyellow;
}
.content-block-image img{
float: right;
}
<div class="content-block-body">
<div class="content-block-text">
<div>月額固定と成果報酬が選べます</div>
<div>成果報酬額に上限おもうけられます</div>
<div>料金が明瞭で予算に合わせた対策が可能</div>
</div>
<div class="content-block-image">
<img src="//placehold.it/250x250">
</div>
</div>
also check out this cool site for code snippets on centering in css.