-71.76% is the change from 857 to 242
Calculation steps:
[( 242 - 857 ) ÷ 857] x 100 = -71.76%
Formula
Percentage change = [(242 - 857) / 857] x 100
Subtract the new number by the original number
242 - 857 = -615
-615 ÷ 857 = -0.7176196032672112
-0.7176196032672112 x 100 = -71.76%