19.31% is the change from 668 to 797
Calculation steps:
[( 797 - 668 ) ÷ 668] x 100 = 19.31%
Formula
Percentage change = [(797 - 668) / 668] x 100
Subtract the new number by the original number
797 - 668 = 129
129 ÷ 668 = 0.19311377245508982
0.19311377245508982 x 100 = 19.31%