-49.57% is the change from 805 to 406
Calculation steps:
[( 406 - 805 ) ÷ 805] x 100 = -49.57%
Formula
Percentage change = [(406 - 805) / 805] x 100
Subtract the new number by the original number
406 - 805 = -399
-399 ÷ 805 = -0.4956521739130435
-0.4956521739130435 x 100 = -49.57%