-61.73% is the change from 857 to 328
Calculation steps:
[( 328 - 857 ) ÷ 857] x 100 = -61.73%
Formula
Percentage change = [(328 - 857) / 857] x 100
Subtract the new number by the original number
328 - 857 = -529
-529 ÷ 857 = -0.617269544924154
-0.617269544924154 x 100 = -61.73%