10 2-6 Teradyne assembles a large printed circuit board called a "backplane. This product is used for communication and storage devices A few years ago the company's production rate was 300 backplanes in seven days in three shifts (24 hours a day). Then, Teradyne converted its production process from batch into assembly line . The result was assembling soo backplanes in five days in two shifts (16 hours a day) Assuming that the same number of workers worked during each shift before and after the conversion, what the percentage growth in labour productivity ? Las