-26.17% is the change from 833 to 615
Calculation steps:
[( 615 - 833 ) ÷ 833] x 100 = -26.17%
Formula
Percentage change = [(615 - 833) / 833] x 100
Subtract the new number by the original number
615 - 833 = -218
-218 ÷ 833 = -0.2617046818727491
-0.2617046818727491 x 100 = -26.17%