-97.18% is the change from 817 to 23
Calculation steps:
[( 23 - 817 ) ÷ 817] x 100 = -97.18%
Formula
Percentage change = [(23 - 817) / 817] x 100
Subtract the new number by the original number
23 - 817 = -794
-794 ÷ 817 = -0.9718482252141983
-0.9718482252141983 x 100 = -97.18%