-34.63% is the change from 823 to 538
Calculation steps:
[( 538 - 823 ) ÷ 823] x 100 = -34.63%
Formula
Percentage change = [(538 - 823) / 823] x 100
Subtract the new number by the original number
538 - 823 = -285
-285 ÷ 823 = -0.3462940461725395
-0.3462940461725395 x 100 = -34.63%