-9.63% is the change from 831 to 751
Calculation steps:
[( 751 - 831 ) ÷ 831] x 100 = -9.63%
Formula
Percentage change = [(751 - 831) / 831] x 100
Subtract the new number by the original number
751 - 831 = -80
-80 ÷ 831 = -0.09626955475330927
-0.09626955475330927 x 100 = -9.63%