-59.91% is the change from 641 to 257
Calculation steps:
[( 257 - 641 ) ÷ 641] x 100 = -59.91%
Formula
Percentage change = [(257 - 641) / 641] x 100
Subtract the new number by the original number
257 - 641 = -384
-384 ÷ 641 = -0.5990639625585024
-0.5990639625585024 x 100 = -59.91%