Answer:
The difference in population is 150750
Explanation:
current populations :
Town A = 700000
Town B = 550000
Town A = 5% increase led to 700000
Town B = 6.5% increase led to 550000
therefore original population before increase is
Town A = 700000 - ( 5% of 700000 )
       = 700000 - ( 35000 )
       = 665000
Town B = Â 550000 - ( 6.5% of 550000 )
       =  550000 - ( 35750 )
       =  514250
hence the difference in population is the difference in original population which is: Â 665000 - 514250 = 150750