-61.61% is the change from 831 to 319
Calculation steps:
[( 319 - 831 ) ÷ 831] x 100 = -61.61%
Formula
Percentage change = [(319 - 831) / 831] x 100
Subtract the new number by the original number
319 - 831 = -512
-512 ÷ 831 = -0.6161251504211793
-0.6161251504211793 x 100 = -61.61%