-69.36% is the change from 643 to 197
Calculation steps:
[( 197 - 643 ) ÷ 643] x 100 = -69.36%
Formula
Percentage change = [(197 - 643) / 643] x 100
Subtract the new number by the original number
197 - 643 = -446
-446 ÷ 643 = -0.6936236391912908
-0.6936236391912908 x 100 = -69.36%