-62.82% is the change from 823 to 306
Calculation steps:
[( 306 - 823 ) ÷ 823] x 100 = -62.82%
Formula
Percentage change = [(306 - 823) / 823] x 100
Subtract the new number by the original number
306 - 823 = -517
-517 ÷ 823 = -0.6281895504252734
-0.6281895504252734 x 100 = -62.82%