-20.37% is the change from 805 to 641
Calculation steps:
[( 641 - 805 ) ÷ 805] x 100 = -20.37%
Formula
Percentage change = [(641 - 805) / 805] x 100
Subtract the new number by the original number
641 - 805 = -164
-164 ÷ 805 = -0.20372670807453416
-0.20372670807453416 x 100 = -20.37%