I am having errors with my blog post and main blog page. It is displaying properly in mobile

On my main blog page, the first post image is always cut off or does not scale right. Can you help?

I have also noticed that my blog posts do not always display correctly in responsive mode.

Please see http://cleverparties.com/2015/03/10-easy-steps-to-fold-a-napkin-into-bunny-ears/

The featured post image is cutoff and as you view it on different devices, tablet and mobile it does not display in a responsive view. Can you help