Macau's own currency, the pataca, is pegged to the Hong Kong dollar, and you can use your Hong Kong currency freely in Macau.
Hong Kong currency is just slightly more valuable than Macau's pataca.
mnli hypothesis: Hong Kong currency is just slightly more valuable than Macau's pataca. premise: Macau's own currency, the pataca, is pegged to the Hong Kong dollar, and you can use your Hong Kong currency freely in Macau.