-50.43% is the change from 817 to 405
Calculation steps:
[( 405 - 817 ) ÷ 817] x 100 = -50.43%
Formula
Percentage change = [(405 - 817) / 817] x 100
Subtract the new number by the original number
405 - 817 = -412
-412 ÷ 817 = -0.5042839657282742
-0.5042839657282742 x 100 = -50.43%