-87.85% is the change from 831 to 101
Calculation steps:
[( 101 - 831 ) ÷ 831] x 100 = -87.85%
Formula
Percentage change = [(101 - 831) / 831] x 100
Subtract the new number by the original number
101 - 831 = -730
-730 ÷ 831 = -0.8784596871239471
-0.8784596871239471 x 100 = -87.85%