28.06.2016, 08:41
Slightly odd, but not totally unexpected given the way floating point arithmetic works. They aren't very precise but good enough for most purposes. The number might as well have been stored as 0.699999... but because you cut it off at two characters it displays that.
https://www.youtube.com/watch?v=PZRI1IfStY0
https://www.youtube.com/watch?v=PZRI1IfStY0