-68.9% is the change from 643 to 200
Calculation steps:
[( 200 - 643 ) ÷ 643] x 100 = -68.9%
Formula
Percentage change = [(200 - 643) / 643] x 100
Subtract the new number by the original number
200 - 643 = -443
-443 ÷ 643 = -0.6889580093312597
-0.6889580093312597 x 100 = -68.9%