-49.81% is the change from 807 to 405
Calculation steps:
[( 405 - 807 ) ÷ 807] x 100 = -49.81%
Formula
Percentage change = [(405 - 807) / 807] x 100
Subtract the new number by the original number
405 - 807 = -402
-402 ÷ 807 = -0.49814126394052044
-0.49814126394052044 x 100 = -49.81%