2.26% is the change from 797 to 815
Calculation steps:
[( 815 - 797 ) ÷ 797] x 100 = 2.26%
Formula
Percentage change = [(815 - 797) / 797] x 100
Subtract the new number by the original number
815 - 797 = 18
18 ÷ 797 = 0.02258469259723965
0.02258469259723965 x 100 = 2.26%