-25.66% is the change from 869 to 646
Calculation steps:
[( 646 - 869 ) ÷ 869] x 100 = -25.66%
Formula
Percentage change = [(646 - 869) / 869] x 100
Subtract the new number by the original number
646 - 869 = -223
-223 ÷ 869 = -0.2566168009205984
-0.2566168009205984 x 100 = -25.66%