-60.49% is the change from 648 to 256
Calculation steps:
[( 256 - 648 ) ÷ 648] x 100 = -60.49%
Formula
Percentage change = [(256 - 648) / 648] x 100
Subtract the new number by the original number
256 - 648 = -392
-392 ÷ 648 = -0.6049382716049383
-0.6049382716049383 x 100 = -60.49%