-35.64% is the change from 996 to 641
Calculation steps:
[( 641 - 996 ) ÷ 996] x 100 = -35.64%
Formula
Percentage change = [(641 - 996) / 996] x 100
Subtract the new number by the original number
641 - 996 = -355
-355 ÷ 996 = -0.35642570281124497
-0.35642570281124497 x 100 = -35.64%