-18.77% is the change from 831 to 675
Calculation steps:
[( 675 - 831 ) ÷ 831] x 100 = -18.77%
Formula
Percentage change = [(675 - 831) / 831] x 100
Subtract the new number by the original number
675 - 831 = -156
-156 ÷ 831 = -0.18772563176895307
-0.18772563176895307 x 100 = -18.77%