-32.16% is the change from 821 to 557
Calculation steps:
[( 557 - 821 ) ÷ 821] x 100 = -32.16%
Formula
Percentage change = [(557 - 821) / 821] x 100
Subtract the new number by the original number
557 - 821 = -264
-264 ÷ 821 = -0.3215590742996346
-0.3215590742996346 x 100 = -32.16%