Complex sentence: A strong educational program was in evidence from the beginning, and the first graduating class, the class of 1927-28, experienced a 75% passing rate, which, under the British Examination system, was quite high.
Split into simpler sentences: A strong educational program was in evidence from the beginning. The first graduating class, class of 1927-1928, experienced a 75% passing rate, which, under the British Examination system, was quite high.