Complex sentence: Upon its release in the UK in November 1971, "Fragile" peaked at number 7 on the UK Album Chart and number 4 on the US "Billboard" 200 during a stay of 46 weeks.
Split into simpler sentences: Upon its release in the UK in November 1971, "Fragile" hit number 7 on the UK Album Chart, which would prove its highest position there. It later reached number 4 on the US "Billboard" 200 during a stay of 46 weeks.