1556.41% is the change from 39 to 646
Calculation steps:
[( 646 - 39 ) ÷ 39] x 100 = 1556.41%
Formula
Percentage change = [(646 - 39) / 39] x 100
Subtract the new number by the original number
646 - 39 = 607
607 ÷ 39 = 15.564102564102564
15.564102564102564 x 100 = 1556.41%