-97.58% is the change from 869 to 21
Calculation steps:
[( 21 - 869 ) ÷ 869] x 100 = -97.58%
Formula
Percentage change = [(21 - 869) / 869] x 100
Subtract the new number by the original number
21 - 869 = -848
-848 ÷ 869 = -0.9758342922899885
-0.9758342922899885 x 100 = -97.58%