-62.33% is the change from 823 to 310
Calculation steps:
[( 310 - 823 ) ÷ 823] x 100 = -62.33%
Formula
Percentage change = [(310 - 823) / 823] x 100
Subtract the new number by the original number
310 - 823 = -513
-513 ÷ 823 = -0.6233292831105711
-0.6233292831105711 x 100 = -62.33%