-83.62% is the change from 641 to 105
Calculation steps:
[( 105 - 641 ) ÷ 641] x 100 = -83.62%
Formula
Percentage change = [(105 - 641) / 641] x 100
Subtract the new number by the original number
105 - 641 = -536
-536 ÷ 641 = -0.8361934477379095
-0.8361934477379095 x 100 = -83.62%