A 0.2407 gram of a mixture containing only magnesium carbonate and calcium carbonate is ignited at 1,500 °C for an hour in a muffle furnace. After cooling the residue in dessicator, only 0.1217 gram of residue remained. Assuming that during the ignition process, all of the carbonate minerals are converted into oxides. Calculate the percentage of carbon dioxide, magnesium oxide and calcium oxide in the sample.