Mumbai, Apr 25 (UNI) The Reserve Bank of India (RBI) today fixed the reference rate at 64.2776 against the US Dollar, down by 19.81 paise over the previous rate of 64.4757. The Euro was fixed 69.8569 down by 13.15 paise over its previous rate of 69.9884. The Pound was registered a 82.2689 (82.4580) and Yen at 58.33 (58.56), an RBI release said. UNI JS HK1419