Complex sentence: The track reached the top ten of the single charts in Great Britain and the US in 1973-number 6 in the USA, number 8 in UK-and sold over one million copies worldwide.
Split into simpler sentences: The track reached the top ten of the single charts in the United Kingdom and the United States in 1973. It reache number six in the USA and number eight in the UK, and sold over one million copies worldwide.