-53.68% is the change from 857 to 397
Calculation steps:
[( 397 - 857 ) ÷ 857] x 100 = -53.68%
Formula
Percentage change = [(397 - 857) / 857] x 100
Subtract the new number by the original number
397 - 857 = -460
-460 ÷ 857 = -0.5367561260210035
-0.5367561260210035 x 100 = -53.68%