Tryit Editor v2.9

Edit This Code:
<!DOCTYPE html>
<html>
<head>
<style>
html, body {
    height: 100%;
}

img.one {
    height: auto;
    width: auto;
}

img.two {
    height: 50%;
    width: 50%;
}
</style>
</head>
<body>

<h2>Set height and width in %:</h2>

<p>Original image:</p>
<img class="one" src="ocean.jpg" width="300" height="300"><br>

<p>Sized image (in %):</p>
<img class="two" src="ocean.jpg" width="300" height="300">

</body>
</html>