-87.68% is the change from 406 to 50
Calculation steps:
[( 50 - 406 ) ÷ 406] x 100 = -87.68%
Formula
Percentage change = [(50 - 406) / 406] x 100
Subtract the new number by the original number
50 - 406 = -356
-356 ÷ 406 = -0.8768472906403941
-0.8768472906403941 x 100 = -87.68%