-62.97% is the change from 821 to 304
Calculation steps:
[( 304 - 821 ) ÷ 821] x 100 = -62.97%
Formula
Percentage change = [(304 - 821) / 821] x 100
Subtract the new number by the original number
304 - 821 = -517
-517 ÷ 821 = -0.6297198538367844
-0.6297198538367844 x 100 = -62.97%