39.37% is the change from 668 to 931
Calculation steps:
[( 931 - 668 ) ÷ 668] x 100 = 39.37%
Formula
Percentage change = [(931 - 668) / 668] x 100
Subtract the new number by the original number
931 - 668 = 263
263 ÷ 668 = 0.3937125748502994
0.3937125748502994 x 100 = 39.37%