29.55% is the change from 670 to 868
Calculation steps:
[( 868 - 670 ) ÷ 670] x 100 = 29.55%
Formula
Percentage change = [(868 - 670) / 670] x 100
Subtract the new number by the original number
868 - 670 = 198
198 ÷ 670 = 0.2955223880597015
0.2955223880597015 x 100 = 29.55%