1. Log in to blogger account and go to Design >>Edit HTML

2.Mark check box "Expand Widget Templates"

3.Find this tag by  using Ctrl+F    <data:post.body/>

4.paste below  one of code after the above tag ( choose style )

Code 1: 

<div style="float:left; margin-right:3px;"></div>
<div class="js-kit-rating"
expr:path="data:post.url"
expr:permalink="data:post.url"
expr:title="data:post.title">
</div>
 

Code :2

expr:path="data:post.url"
expr:permalink="data:post.url"
expr:title="data:post.title" view="score">
</div>

5. Now again find this code by using Ctrl+F   </body>

6. Paste below code before </body> tag

<script src="http://js-kit.com/ratings.js"></script>

7. Now click preview and click save template. you are done.