-6.21% is the change from 869 to 815
Calculation steps:
[( 815 - 869 ) ÷ 869] x 100 = -6.21%
Formula
Percentage change = [(815 - 869) / 869] x 100
Subtract the new number by the original number
815 - 869 = -54
-54 ÷ 869 = -0.06214039125431531
-0.06214039125431531 x 100 = -6.21%