646.15% is the change from 39 to 291
Calculation steps:
[( 291 - 39 ) ÷ 39] x 100 = 646.15%
Formula
Percentage change = [(291 - 39) / 39] x 100
Subtract the new number by the original number
291 - 39 = 252
252 ÷ 39 = 6.461538461538462
6.461538461538462 x 100 = 646.15%