9.63% is the change from 831 to 911
Calculation steps:
[( 911 - 831 ) ÷ 831] x 100 = 9.63%
Formula
Percentage change = [(911 - 831) / 831] x 100
Subtract the new number by the original number
911 - 831 = 80
80 ÷ 831 = 0.09626955475330927
0.09626955475330927 x 100 = 9.63%