-50.54% is the change from 827 to 409
Calculation steps:
[( 409 - 827 ) ÷ 827] x 100 = -50.54%
Formula
Percentage change = [(409 - 827) / 827] x 100
Subtract the new number by the original number
409 - 827 = -418
-418 ÷ 827 = -0.5054413542926239
-0.5054413542926239 x 100 = -50.54%