Photon, image size don't display correctly

Hello,

When I activated the Phonton module my images don’t display in the correct size.
Look: https://awesomescreenshot.com/0451pbgjc3

and without Photon: https://www.arraianos-film.com/festivales/

the code of this img is <img alt="festivals" src="https://www.arraianos-film.com/wp-content/uploads/2013/07/festivales_grande1.png" width="100%" />

Any idea how can I fix it?
I use Jetpack 2.4.2 on WP 3.6

Thanks!

https://www.ads-software.com/plugins/jetpack/