8.2% is the change from 768 to 831
Calculation steps:
[( 831 - 768 ) ÷ 768] x 100 = 8.2%
Formula
Percentage change = [(831 - 768) / 768] x 100
Subtract the new number by the original number
831 - 768 = 63
63 ÷ 768 = 0.08203125
0.08203125 x 100 = 8.2%