20.03% is the change from 664 to 797
Calculation steps:
[( 797 - 664 ) ÷ 664] x 100 = 20.03%
Formula
Percentage change = [(797 - 664) / 664] x 100
Subtract the new number by the original number
797 - 664 = 133
133 ÷ 664 = 0.2003012048192771
0.2003012048192771 x 100 = 20.03%