-50.42% is the change from 831 to 412
Calculation steps:
[( 412 - 831 ) ÷ 831] x 100 = -50.42%
Formula
Percentage change = [(412 - 831) / 831] x 100
Subtract the new number by the original number
412 - 831 = -419
-419 ÷ 831 = -0.5042117930204573
-0.5042117930204573 x 100 = -50.42%