-62.78% is the change from 857 to 319
Calculation steps:
[( 319 - 857 ) ÷ 857] x 100 = -62.78%
Formula
Percentage change = [(319 - 857) / 857] x 100
Subtract the new number by the original number
319 - 857 = -538
-538 ÷ 857 = -0.6277712952158693
-0.6277712952158693 x 100 = -62.78%