22.74% is the change from 664 to 815
Calculation steps:
[( 815 - 664 ) ÷ 664] x 100 = 22.74%
Formula
Percentage change = [(815 - 664) / 664] x 100
Subtract the new number by the original number
815 - 664 = 151
151 ÷ 664 = 0.22740963855421686
0.22740963855421686 x 100 = 22.74%