-41.58% is the change from 861 to 503
Calculation steps:
[( 503 - 861 ) ÷ 861] x 100 = -41.58%
Formula
Percentage change = [(503 - 861) / 861] x 100
Subtract the new number by the original number
503 - 861 = -358
-358 ÷ 861 = -0.41579558652729387
-0.41579558652729387 x 100 = -41.58%