Complex sentence: Even after the central bank's intervention early in the morning, at one point later that morning on December 16,2014, it took 79 Russian rubles to purchase one U.S. dollar, a decline from the rate of 33 rubles to the dollar in January 2014.
Split into simpler sentences: Even after the central bank's intervention early in the morning, the ruble declined further. At one point later in the morning on December 16,2014, it took 79 Russian rubles to purchase one U.S. dollar, a decline from the rate of 33 rubles to the dollar in January 2014.