You don't need the inline and you aren't declaring the css properly in your mark-up.
align="center" is a deprecated and also unnecessary attribute.
Put the css in the head information of your page.
To center your wrapper use:
However, your wrapper should also declare a width and your left and right divisions a percentage of that width, remembering, unless declared otherwise, that borders, margin, and padding are automatic in some browsers. So, you don't make left and right equal to 100%.
margin: 0 auto;
/*Your left and right divisions should be declared (in css) as */
Your html will be: