8.51% is the change from 858 to 931
Calculation steps:
[( 931 - 858 ) ÷ 858] x 100 = 8.51%
Formula
Percentage change = [(931 - 858) / 858] x 100
Subtract the new number by the original number
931 - 858 = 73
73 ÷ 858 = 0.08508158508158509
0.08508158508158509 x 100 = 8.51%