-77.26% is the change from 831 to 189
Calculation steps:
[( 189 - 831 ) ÷ 831] x 100 = -77.26%
Formula
Percentage change = [(189 - 831) / 831] x 100
Subtract the new number by the original number
189 - 831 = -642
-642 ÷ 831 = -0.7725631768953068
-0.7725631768953068 x 100 = -77.26%