-49.58% is the change from 831 to 419
Calculation steps:
[( 419 - 831 ) ÷ 831] x 100 = -49.58%
Formula
Percentage change = [(419 - 831) / 831] x 100
Subtract the new number by the original number
419 - 831 = -412
-412 ÷ 831 = -0.49578820697954273
-0.49578820697954273 x 100 = -49.58%