-80.19% is the change from 641 to 127
Calculation steps:
[( 127 - 641 ) ÷ 641] x 100 = -80.19%
Formula
Percentage change = [(127 - 641) / 641] x 100
Subtract the new number by the original number
127 - 641 = -514
-514 ÷ 641 = -0.8018720748829953
-0.8018720748829953 x 100 = -80.19%