-45.01% is the change from 831 to 457
Calculation steps:
[( 457 - 831 ) ÷ 831] x 100 = -45.01%
Formula
Percentage change = [(457 - 831) / 831] x 100
Subtract the new number by the original number
457 - 831 = -374
-374 ÷ 831 = -0.4500601684717208
-0.4500601684717208 x 100 = -45.01%