21.32% is the change from 666 to 808
Calculation steps:
[( 808 - 666 ) ÷ 666] x 100 = 21.32%
Formula
Percentage change = [(808 - 666) / 666] x 100
Subtract the new number by the original number
808 - 666 = 142
142 ÷ 666 = 0.2132132132132132
0.2132132132132132 x 100 = 21.32%