-61.61% is the change from 857 to 329
Calculation steps:
[( 329 - 857 ) ÷ 857] x 100 = -61.61%
Formula
Percentage change = [(329 - 857) / 857] x 100
Subtract the new number by the original number
329 - 857 = -528
-528 ÷ 857 = -0.6161026837806302
-0.6161026837806302 x 100 = -61.61%