-41.28% is the change from 831 to 488
Calculation steps:
[( 488 - 831 ) ÷ 831] x 100 = -41.28%
Formula
Percentage change = [(488 - 831) / 831] x 100
Subtract the new number by the original number
488 - 831 = -343
-343 ÷ 831 = -0.4127557160048135
-0.4127557160048135 x 100 = -41.28%