(2) B is(a) where the tax is deemed under section 252 to have been paid by the registrant in respect of the acquisition or bringing into Québec by the registrant of the property, the percentage that the intended use of the property in the commercial activities of the registrant is of the intended use of the property in those commercial activities and other activities engaged in by the registrant in the course of making exempt supplies; and
(b) in any other case, the percentage that the intended use of the property or service in those commercial activities of the registrant is of the total intended use of the property or service.