-40.16% is the change from 869 to 520
Calculation steps:
[( 520 - 869 ) ÷ 869] x 100 = -40.16%
Formula
Percentage change = [(520 - 869) / 869] x 100
Subtract the new number by the original number
520 - 869 = -349
-349 ÷ 869 = -0.4016110471806674
-0.4016110471806674 x 100 = -40.16%