>>29403829I said, assuming they have the same spread as Zygarde 50% (which is probably not the case).
But we can try to guess it based on flavor text.
Zygarde 10% (mantains physical attack and speed) base stats:
HP 54
ATK 100
DEF 62
SP.ATK 41
SP.DEF 48
SPEED 95
TOTAL 400
Zygarde Complete (mantains defenses and speed) base stats:
HP 216
ATK 151
DEF 121
SP.ATK 122
SP.DEF 95
SPEED 95
TOTAL 800