-68.65% is the change from 823 to 258
Calculation steps:
[( 258 - 823 ) ÷ 823] x 100 = -68.65%
Formula
Percentage change = [(258 - 823) / 823] x 100
Subtract the new number by the original number
258 - 823 = -565
-565 ÷ 823 = -0.6865127582017011
-0.6865127582017011 x 100 = -68.65%