-42.24% is the change from 831 to 480
Calculation steps:
[( 480 - 831 ) ÷ 831] x 100 = -42.24%
Formula
Percentage change = [(480 - 831) / 831] x 100
Subtract the new number by the original number
480 - 831 = -351
-351 ÷ 831 = -0.4223826714801444
-0.4223826714801444 x 100 = -42.24%