-39.49% is the change from 823 to 498
Calculation steps:
[( 498 - 823 ) ÷ 823] x 100 = -39.49%
Formula
Percentage change = [(498 - 823) / 823] x 100
Subtract the new number by the original number
498 - 823 = -325
-325 ÷ 823 = -0.39489671931956255
-0.39489671931956255 x 100 = -39.49%