-41.66% is the change from 857 to 500
Calculation steps:
[( 500 - 857 ) ÷ 857] x 100 = -41.66%
Formula
Percentage change = [(500 - 857) / 857] x 100
Subtract the new number by the original number
500 - 857 = -357
-357 ÷ 857 = -0.41656942823803966
-0.41656942823803966 x 100 = -41.66%