The total number of buildings constructed across the cities is approximately what per cent of the total number of buildings redeveloped across the cities?

Total number of buildings constructed across the cities = 200 + 100 + 225 + 300 = 1100
Total number of buildings redeveloped across the cities = 300 + 275 + 250 = 1400
Required percentage = 1100 x 100 /1400 = 78.57% approx. 79%