-60.79% is the change from 857 to 336
Calculation steps:
[( 336 - 857 ) ÷ 857] x 100 = -60.79%
Formula
Percentage change = [(336 - 857) / 857] x 100
Subtract the new number by the original number
336 - 857 = -521
-521 ÷ 857 = -0.6079346557759626
-0.6079346557759626 x 100 = -60.79%