-38.39% is the change from 857 to 528
Calculation steps:
[( 528 - 857 ) ÷ 857] x 100 = -38.39%
Formula
Percentage change = [(528 - 857) / 857] x 100
Subtract the new number by the original number
528 - 857 = -329
-329 ÷ 857 = -0.3838973162193699
-0.3838973162193699 x 100 = -38.39%