Complex sentence: By 2011, he had presided over approximately 600 cases that had gone to verdict or judgment, of which approximately 55 per cent were jury trials, and 70 per cent were criminal proceedings.
Split into simpler sentences: By 2011, he had presided over approximately 600 cases that had gone to verdict or judgment. Of those, approximately 55 per cent were jury trials, and 70 per cent were criminal proceedings.