-29.6% is the change from 821 to 578
Calculation steps:
[( 578 - 821 ) ÷ 821] x 100 = -29.6%
Formula
Percentage change = [(578 - 821) / 821] x 100
Subtract the new number by the original number
578 - 821 = -243
-243 ÷ 821 = -0.29598051157125455
-0.29598051157125455 x 100 = -29.6%