-33.78% is the change from 823 to 545
Calculation steps:
[( 545 - 823 ) ÷ 823] x 100 = -33.78%
Formula
Percentage change = [(545 - 823) / 823] x 100
Subtract the new number by the original number
545 - 823 = -278
-278 ÷ 823 = -0.3377885783718105
-0.3377885783718105 x 100 = -33.78%