20.36% is the change from 668 to 804
Calculation steps:
[( 804 - 668 ) ÷ 668] x 100 = 20.36%
Formula
Percentage change = [(804 - 668) / 668] x 100
Subtract the new number by the original number
804 - 668 = 136
136 ÷ 668 = 0.20359281437125748
0.20359281437125748 x 100 = 20.36%