-62.74% is the change from 687 to 256
Calculation steps:
[( 256 - 687 ) ÷ 687] x 100 = -62.74%
Formula
Percentage change = [(256 - 687) / 687] x 100
Subtract the new number by the original number
256 - 687 = -431
-431 ÷ 687 = -0.6273653566229985
-0.6273653566229985 x 100 = -62.74%