-78.1% is the change from 831 to 182
Calculation steps:
[( 182 - 831 ) ÷ 831] x 100 = -78.1%
Formula
Percentage change = [(182 - 831) / 831] x 100
Subtract the new number by the original number
182 - 831 = -649
-649 ÷ 831 = -0.7809867629362214
-0.7809867629362214 x 100 = -78.1%