-62.94% is the change from 823 to 305
Calculation steps:
[( 305 - 823 ) ÷ 823] x 100 = -62.94%
Formula
Percentage change = [(305 - 823) / 823] x 100
Subtract the new number by the original number
305 - 823 = -518
-518 ÷ 823 = -0.6294046172539489
-0.6294046172539489 x 100 = -62.94%