-82.85% is the change from 857 to 147
Calculation steps:
[( 147 - 857 ) ÷ 857] x 100 = -82.85%
Formula
Percentage change = [(147 - 857) / 857] x 100
Subtract the new number by the original number
147 - 857 = -710
-710 ÷ 857 = -0.8284714119019837
-0.8284714119019837 x 100 = -82.85%