-62.09% is the change from 823 to 312
Calculation steps:
[( 312 - 823 ) ÷ 823] x 100 = -62.09%
Formula
Percentage change = [(312 - 823) / 823] x 100
Subtract the new number by the original number
312 - 823 = -511
-511 ÷ 823 = -0.6208991494532199
-0.6208991494532199 x 100 = -62.09%