-61.39% is the change from 663 to 256
Calculation steps:
[( 256 - 663 ) ÷ 663] x 100 = -61.39%
Formula
Percentage change = [(256 - 663) / 663] x 100
Subtract the new number by the original number
256 - 663 = -407
-407 ÷ 663 = -0.6138763197586727
-0.6138763197586727 x 100 = -61.39%