Way too high, though not surprising if its only a handful of pageviews. But you might want to check your stats.
I mean to say if its only 3-4 page views then its entirely possible that you get a 100% ctr out of them, however if this is the case even when the page views are higher then something is definitely wrong.
Its normal if it is 1 impression and 1 click - eCPM would never be in % it will be in $ - as it is price per 1000 impressions
just relax for those 1-10 impressions and 1 click, your ecpm always tend to be higher. it will ease off once impressions are higher.