93.23% is the change from 399 to 771
Calculation steps:
[( 771 - 399 ) ÷ 399] x 100 = 93.23%
Formula
Percentage change = [(771 - 399) / 399] x 100
Subtract the new number by the original number
771 - 399 = 372
372 ÷ 399 = 0.9323308270676691
0.9323308270676691 x 100 = 93.23%