-61.73% is the change from 823 to 315
Calculation steps:
[( 315 - 823 ) ÷ 823] x 100 = -61.73%
Formula
Percentage change = [(315 - 823) / 823] x 100
Subtract the new number by the original number
315 - 823 = -508
-508 ÷ 823 = -0.6172539489671932
-0.6172539489671932 x 100 = -61.73%