-62.93% is the change from 820 to 304
Calculation steps:
[( 304 - 820 ) ÷ 820] x 100 = -62.93%
Formula
Percentage change = [(304 - 820) / 820] x 100
Subtract the new number by the original number
304 - 820 = -516
-516 ÷ 820 = -0.6292682926829268
-0.6292682926829268 x 100 = -62.93%