25.23% is the change from 666 to 834
Calculation steps:
[( 834 - 666 ) ÷ 666] x 100 = 25.23%
Formula
Percentage change = [(834 - 666) / 666] x 100
Subtract the new number by the original number
834 - 666 = 168
168 ÷ 666 = 0.25225225225225223
0.25225225225225223 x 100 = 25.23%