"Detroit - the area saw a 26% growth in the high-tech industry, creating over 127,000 new tech jobs." How would that be only a 26% growth? Does Detroit suppose

"Detroit - the area saw a 26% growth in the high-tech industry, creating over 127,000 new tech jobs." How would that be only a 26% growth? Does Detroit supposedly employ 500,000 tech jobs ( 25% = 125,000 x 4 = 500,000)? Forget the numbers, even Detroit as a whole is hard to buy - what about Boston?