81.33% is the change from 391 to 709
Calculation steps:
[( 709 - 391 ) ÷ 391] x 100 = 81.33%
Formula
Percentage change = [(709 - 391) / 391] x 100
Subtract the new number by the original number
709 - 391 = 318
318 ÷ 391 = 0.8132992327365729
0.8132992327365729 x 100 = 81.33%