-68.74% is the change from 643 to 201
Calculation steps:
[( 201 - 643 ) ÷ 643] x 100 = -68.74%
Formula
Percentage change = [(201 - 643) / 643] x 100
Subtract the new number by the original number
201 - 643 = -442
-442 ÷ 643 = -0.687402799377916
-0.687402799377916 x 100 = -68.74%