78.2% is the change from 399 to 711
Calculation steps:
[( 711 - 399 ) ÷ 399] x 100 = 78.2%
Formula
Percentage change = [(711 - 399) / 399] x 100
Subtract the new number by the original number
711 - 399 = 312
312 ÷ 399 = 0.7819548872180451
0.7819548872180451 x 100 = 78.2%