-62.48% is the change from 821 to 308
Calculation steps:
[( 308 - 821 ) ÷ 821] x 100 = -62.48%
Formula
Percentage change = [(308 - 821) / 821] x 100
Subtract the new number by the original number
308 - 821 = -513
-513 ÷ 821 = -0.6248477466504263
-0.6248477466504263 x 100 = -62.48%