20.57% is the change from 666 to 803
Calculation steps:
[( 803 - 666 ) ÷ 666] x 100 = 20.57%
Formula
Percentage change = [(803 - 666) / 666] x 100
Subtract the new number by the original number
803 - 666 = 137
137 ÷ 666 = 0.2057057057057057
0.2057057057057057 x 100 = 20.57%