-84.2% is the change from 829 to 131
Calculation steps:
[( 131 - 829 ) ÷ 829] x 100 = -84.2%
Formula
Percentage change = [(131 - 829) / 829] x 100
Subtract the new number by the original number
131 - 829 = -698
-698 ÷ 829 = -0.841978287092883
-0.841978287092883 x 100 = -84.2%