-83.93% is the change from 641 to 103
Calculation steps:
[( 103 - 641 ) ÷ 641] x 100 = -83.93%
Formula
Percentage change = [(103 - 641) / 641] x 100
Subtract the new number by the original number
103 - 641 = -538
-538 ÷ 641 = -0.8393135725429017
-0.8393135725429017 x 100 = -83.93%