9.75% is the change from 831 to 912
Calculation steps:
[( 912 - 831 ) ÷ 831] x 100 = 9.75%
Formula
Percentage change = [(912 - 831) / 831] x 100
Subtract the new number by the original number
912 - 831 = 81
81 ÷ 831 = 0.09747292418772563
0.09747292418772563 x 100 = 9.75%