-40.34% is the change from 823 to 491
Calculation steps:
[( 491 - 823 ) ÷ 823] x 100 = -40.34%
Formula
Percentage change = [(491 - 823) / 823] x 100
Subtract the new number by the original number
491 - 823 = -332
-332 ÷ 823 = -0.40340218712029163
-0.40340218712029163 x 100 = -40.34%