Around 35 per cent shortfall of teachers in 23 IITs: RTI Industry-The Economic Times — February 14, 2017 comments off In old IITs, 30% posts of teachers are lying vacant at IIT Bombay, Delhi (35%), Guwahati (27%), Kanpur (37%), Kharagpur (46%), Madras (28%), Roorkee (45%) and IIT BHU (47%).