Complex sentence: "Bad Day" was the eleventh-best-selling single of 2005; it ranked 11th and 157th on the year-end UK Singles Charts of 2005 and 2006 respectively.
Split into simpler sentences: Bad Day was the eleventh-best-selling single of 2005 in the UK. It ranked 11th and 157th on the year-end UK Singles Charts of 2005 and 2006 respectively.