-8.38% is the change from 907 to 831
Calculation steps:
[( 831 - 907 ) ÷ 907] x 100 = -8.38%
Formula
Percentage change = [(831 - 907) / 907] x 100
Subtract the new number by the original number
831 - 907 = -76
-76 ÷ 907 = -0.08379272326350606
-0.08379272326350606 x 100 = -8.38%