-76.77% is the change from 831 to 193
Calculation steps:
[( 193 - 831 ) ÷ 831] x 100 = -76.77%
Formula
Percentage change = [(193 - 831) / 831] x 100
Subtract the new number by the original number
193 - 831 = -638
-638 ÷ 831 = -0.7677496991576414
-0.7677496991576414 x 100 = -76.77%