Sounds like a ~33% improvement.....
Yep, what the article doesn't specifically mention is that the reduction of terrorist in the area is helping the Kurds control and eliminate cross border arms supplies to the ISIS terrorists.
The Kurds have been begging for US help while Obama shines 'em on and allows the Turks to bomb the crap outta them.
No more, with the Russians there backed by the S-400, so the Kurds supply the Russians with intel and they themselves, intend to close the border crossing completely to arms and ISIS infiltrators no matter which way they intend to go (France take note).
Obama's plan is hitting snags that only WWIII will smooth out.