-97.81% is the change from 823 to 18
Calculation steps:
[( 18 - 823 ) ÷ 823] x 100 = -97.81%
Formula
Percentage change = [(18 - 823) / 823] x 100
Subtract the new number by the original number
18 - 823 = -805
-805 ÷ 823 = -0.9781287970838396
-0.9781287970838396 x 100 = -97.81%