-62.12% is the change from 813 to 308
Calculation steps:
[( 308 - 813 ) ÷ 813] x 100 = -62.12%
Formula
Percentage change = [(308 - 813) / 813] x 100
Subtract the new number by the original number
308 - 813 = -505
-505 ÷ 813 = -0.6211562115621156
-0.6211562115621156 x 100 = -62.12%