-28.94% is the change from 857 to 609
Calculation steps:
[( 609 - 857 ) ÷ 857] x 100 = -28.94%
Formula
Percentage change = [(609 - 857) / 857] x 100
Subtract the new number by the original number
609 - 857 = -248
-248 ÷ 857 = -0.2893815635939323
-0.2893815635939323 x 100 = -28.94%