86.19% is the change from 391 to 728
Calculation steps:
[( 728 - 391 ) ÷ 391] x 100 = 86.19%
Formula
Percentage change = [(728 - 391) / 391] x 100
Subtract the new number by the original number
728 - 391 = 337
337 ÷ 391 = 0.8618925831202046
0.8618925831202046 x 100 = 86.19%