22.52% is the change from 666 to 816
Calculation steps:
[( 816 - 666 ) ÷ 666] x 100 = 22.52%
Formula
Percentage change = [(816 - 666) / 666] x 100
Subtract the new number by the original number
816 - 666 = 150
150 ÷ 666 = 0.22522522522522523
0.22522522522522523 x 100 = 22.52%