The AC of the West Siberian district indicated that there is no prohibition on calculating such a period in percent. It will not lead to an unreasonable limitation of the number of participants in the purchase, If the customer will do that.
Federal Antimonopoly Service decides that fixing the term in the procurement documentation in percent limits the number of participants.
If guided by the position of the department, then the claims of territorial antimonopoly services should not be.
Document: Resolution of the AU of the West Siberian District of 11.07.2017 on the case N A27-19494 / 2016