-23.7% is the change from 806 to 615
Calculation steps:
[( 615 - 806 ) ÷ 806] x 100 = -23.7%
Formula
Percentage change = [(615 - 806) / 806] x 100
Subtract the new number by the original number
615 - 806 = -191
-191 ÷ 806 = -0.2369727047146402
-0.2369727047146402 x 100 = -23.7%