Answer:
28%
Explanation:
To increase a number by a certain percentage it is multiplied by a decimal greater than 1. E.g. if we wanted to find 20% more of 20,000, we would do:
20% increase to a number = 1.2
20,000x1.2= 24,000
Original number x Percentage increase = Final number
Since we don't know the percentage increase, but have both other variables, we can rearrange the above equation to solve for it:
Percentage increase = final number/original number
Percentage increase = 25600/20000
Percentage increase = 1.28
Therefore the area was increased by 28%.
Hope this helped!