-75.15% is the change from 821 to 204
Calculation steps:
[( 204 - 821 ) ÷ 821] x 100 = -75.15%
Formula
Percentage change = [(204 - 821) / 821] x 100
Subtract the new number by the original number
204 - 821 = -617
-617 ÷ 821 = -0.7515225334957369
-0.7515225334957369 x 100 = -75.15%