-50.66% is the change from 831 to 410
Calculation steps:
[( 410 - 831 ) ÷ 831] x 100 = -50.66%
Formula
Percentage change = [(410 - 831) / 831] x 100
Subtract the new number by the original number
410 - 831 = -421
-421 ÷ 831 = -0.50661853188929
-0.50661853188929 x 100 = -50.66%