-50.43% is the change from 809 to 401
Calculation steps:
[( 401 - 809 ) ÷ 809] x 100 = -50.43%
Formula
Percentage change = [(401 - 809) / 809] x 100
Subtract the new number by the original number
401 - 809 = -408
-408 ÷ 809 = -0.5043263288009888
-0.5043263288009888 x 100 = -50.43%