-67.39% is the change from 641 to 209
Calculation steps:
[( 209 - 641 ) ÷ 641] x 100 = -67.39%
Formula
Percentage change = [(209 - 641) / 641] x 100
Subtract the new number by the original number
209 - 641 = -432
-432 ÷ 641 = -0.6739469578783152
-0.6739469578783152 x 100 = -67.39%