-28.7% is the change from 857 to 611
Calculation steps:
[( 611 - 857 ) ÷ 857] x 100 = -28.7%
Formula
Percentage change = [(611 - 857) / 857] x 100
Subtract the new number by the original number
611 - 857 = -246
-246 ÷ 857 = -0.2870478413068845
-0.2870478413068845 x 100 = -28.7%