-62.94% is the change from 831 to 308
Calculation steps:
[( 308 - 831 ) ÷ 831] x 100 = -62.94%
Formula
Percentage change = [(308 - 831) / 831] x 100
Subtract the new number by the original number
308 - 831 = -523
-523 ÷ 831 = -0.6293622141997594
-0.6293622141997594 x 100 = -62.94%