-26.26% is the change from 834 to 615
Calculation steps:
[( 615 - 834 ) ÷ 834] x 100 = -26.26%
Formula
Percentage change = [(615 - 834) / 834] x 100
Subtract the new number by the original number
615 - 834 = -219
-219 ÷ 834 = -0.26258992805755393
-0.26258992805755393 x 100 = -26.26%