25.22% is the change from 670 to 839
Calculation steps:
[( 839 - 670 ) ÷ 670] x 100 = 25.22%
Formula
Percentage change = [(839 - 670) / 670] x 100
Subtract the new number by the original number
839 - 670 = 169
169 ÷ 670 = 0.25223880597014925
0.25223880597014925 x 100 = 25.22%