-61.96% is the change from 673 to 256
Calculation steps:
[( 256 - 673 ) ÷ 673] x 100 = -61.96%
Formula
Percentage change = [(256 - 673) / 673] x 100
Subtract the new number by the original number
256 - 673 = -417
-417 ÷ 673 = -0.6196136701337296
-0.6196136701337296 x 100 = -61.96%