-24.17% is the change from 811 to 615
Calculation steps:
[( 615 - 811 ) ÷ 811] x 100 = -24.17%
Formula
Percentage change = [(615 - 811) / 811] x 100
Subtract the new number by the original number
615 - 811 = -196
-196 ÷ 811 = -0.24167694204685575
-0.24167694204685575 x 100 = -24.17%