-47.05% is the change from 831 to 440
Calculation steps:
[( 440 - 831 ) ÷ 831] x 100 = -47.05%
Formula
Percentage change = [(440 - 831) / 831] x 100
Subtract the new number by the original number
440 - 831 = -391
-391 ÷ 831 = -0.470517448856799
-0.470517448856799 x 100 = -47.05%