-76.17% is the change from 831 to 198
Calculation steps:
[( 198 - 831 ) ÷ 831] x 100 = -76.17%
Formula
Percentage change = [(198 - 831) / 831] x 100
Subtract the new number by the original number
198 - 831 = -633
-633 ÷ 831 = -0.7617328519855595
-0.7617328519855595 x 100 = -76.17%