-78.22% is the change from 831 to 181
Calculation steps:
[( 181 - 831 ) ÷ 831] x 100 = -78.22%
Formula
Percentage change = [(181 - 831) / 831] x 100
Subtract the new number by the original number
181 - 831 = -650
-650 ÷ 831 = -0.7821901323706378
-0.7821901323706378 x 100 = -78.22%