-55.59% is the change from 921 to 409
Calculation steps:
[( 409 - 921 ) ÷ 921] x 100 = -55.59%
Formula
Percentage change = [(409 - 921) / 921] x 100
Subtract the new number by the original number
409 - 921 = -512
-512 ÷ 921 = -0.5559174809989142
-0.5559174809989142 x 100 = -55.59%