-35.44% is the change from 996 to 643
Calculation steps:
[( 643 - 996 ) ÷ 996] x 100 = -35.44%
Formula
Percentage change = [(643 - 996) / 996] x 100
Subtract the new number by the original number
643 - 996 = -353
-353 ÷ 996 = -0.35441767068273095
-0.35441767068273095 x 100 = -35.44%