-80.34% is the change from 641 to 126
Calculation steps:
[( 126 - 641 ) ÷ 641] x 100 = -80.34%
Formula
Percentage change = [(126 - 641) / 641] x 100
Subtract the new number by the original number
126 - 641 = -515
-515 ÷ 641 = -0.8034321372854915
-0.8034321372854915 x 100 = -80.34%