81.84% is the change from 391 to 711
Calculation steps:
[( 711 - 391 ) ÷ 391] x 100 = 81.84%
Formula
Percentage change = [(711 - 391) / 391] x 100
Subtract the new number by the original number
711 - 391 = 320
320 ÷ 391 = 0.8184143222506394
0.8184143222506394 x 100 = 81.84%