The Reserve Bank today fixed the reference rate of the rupee for the US dollar at 53.6300 and the euro at 69.7455 as against 53.5895 a dollar and 69.9070 a euro as on Tuesday. In a press release issued by RBI, the exchange rates for the pound and yen against the rupee were quoted at 86.1780 a pound and 66.91 per 100 yen, based on reference rates for the US dollar and cross-currency quotes at noon. The reference rate is based on the noon rates of select banks here and the SDR-Rupee rate would be based on this rate, the release added.