66.7268 is the rupee reference rate against the US dollar set by the Reserve Bank of India. While, as compared to Monday’s rate than it were 66.7779.
As per the RBI statement, “the exchange rates for the pound and the yen against the rupee were 81.7136 and 64.14 per 100 yens, respectively, based on reference rates for the dollar and cross-currency quotes at noon”
Meanwhile, the statement added that, “The SDR-rupee figure will be based on this rate”
