39.94% is the change from 671 to 939
Calculation steps:
[( 939 - 671 ) ÷ 671] x 100 = 39.94%
Formula
Percentage change = [(939 - 671) / 671] x 100
Subtract the new number by the original number
939 - 671 = 268
268 ÷ 671 = 0.39940387481371087
0.39940387481371087 x 100 = 39.94%