22.12% is the change from 660 to 806
Calculation steps:
[( 806 - 660 ) ÷ 660] x 100 = 22.12%
Formula
Percentage change = [(806 - 660) / 660] x 100
Subtract the new number by the original number
806 - 660 = 146
146 ÷ 660 = 0.22121212121212122
0.22121212121212122 x 100 = 22.12%