-97.18% is the change from 816 to 23
Calculation steps:
[( 23 - 816 ) ÷ 816] x 100 = -97.18%
Formula
Percentage change = [(23 - 816) / 816] x 100
Subtract the new number by the original number
23 - 816 = -793
-793 ÷ 816 = -0.9718137254901961
-0.9718137254901961 x 100 = -97.18%