How can I make this code work in css?

I have this page

http://ift.tt/1Hnia4O

right column passed as you can see below.

This is because this code

.theme-page-wrapper.right-layout .theme-content, 
.theme-page-wrapper.left-layout .theme-content {
    width: 90% !important; //This should be the 73%
}

I only want 70% value on this page and I tried this code

body.page.page-id-7674.theme-page-wrapper.right-layout .theme-content, 
.theme-page-wrapper.left-layout .theme-content {
    width: 73% !important;
}

Unfortunately this code is not working and can not understand why. Can you please help me solve this problem?

Thanks in advance!