It's the same on mine. Google play services has taken 1.7% and has been running in the background for 16 h 49 m, since last full charge. Google play store 0.9%. I'm guessing Google play store is down to having automatic updates on. So it's running in the background checking.
I have fully checked and trust me it's Google play services and the actual store. Yes I know when we use our phone other stuff are in background but still it's not right. Even iPhones don't have much in background. I love Android for a reason. So user friendly giving so many options. I don't customise my phone apart from put majority apps to sleep. With Google background processors I can't seem to disable things such as play store or Google play services so it seems to me it's definitely the software with Google play and play services