Complex sentence: It later registered the second largest single weekly decline for a number one album in ARIA chart history when it dropped from 1 to 20, only "Psycho Circus" by Kiss, had a more precipitous drop, from 1 to 32.
Split into simpler sentences: It later registered the second-largest weekly decline for a number 1 album in ARIA chart history when it dropped from 1 to 20. Only "Psycho Circus" by Kiss had a more precipitous drop from 1 to 32.