-39.79% is the change from 857 to 516
Calculation steps:
[( 516 - 857 ) ÷ 857] x 100 = -39.79%
Formula
Percentage change = [(516 - 857) / 857] x 100
Subtract the new number by the original number
516 - 857 = -341
-341 ÷ 857 = -0.39789964994165694
-0.39789964994165694 x 100 = -39.79%