-69.52% is the change from 643 to 196
Calculation steps:
[( 196 - 643 ) ÷ 643] x 100 = -69.52%
Formula
Percentage change = [(196 - 643) / 643] x 100
Subtract the new number by the original number
196 - 643 = -447
-447 ÷ 643 = -0.6951788491446346
-0.6951788491446346 x 100 = -69.52%