Complex sentence: By 1913, numbers had dropped to 44.6 per cent compared to 1900, and by 1921 to only 23.3 percent and the patronage of Broad Street station declined accordingly.
Split into simpler sentences: By 1913, numbers had dropped to 44.6 per cent compared to 1900, and by 1921 to only 23.3 percent. The patronage of Broad Street station declined accordingly.