-29.55% is the change from 873 to 615
Calculation steps:
[( 615 - 873 ) ÷ 873] x 100 = -29.55%
Formula
Percentage change = [(615 - 873) / 873] x 100
Subtract the new number by the original number
615 - 873 = -258
-258 ÷ 873 = -0.29553264604810997
-0.29553264604810997 x 100 = -29.55%