164.84% is the change from 256 to 678
Calculation steps:
[( 678 - 256 ) ÷ 256] x 100 = 164.84%
Formula
Percentage change = [(678 - 256) / 256] x 100
Subtract the new number by the original number
678 - 256 = 422
422 ÷ 256 = 1.6484375
1.6484375 x 100 = 164.84%