-97.23% is the change from 829 to 23
Calculation steps:
[( 23 - 829 ) ÷ 829] x 100 = -97.23%
Formula
Percentage change = [(23 - 829) / 829] x 100
Subtract the new number by the original number
23 - 829 = -806
-806 ÷ 829 = -0.9722557297949337
-0.9722557297949337 x 100 = -97.23%