90.83% is the change from 349 to 666
Calculation steps:
[( 666 - 349 ) ÷ 349] x 100 = 90.83%
Formula
Percentage change = [(666 - 349) / 349] x 100
Subtract the new number by the original number
666 - 349 = 317
317 ÷ 349 = 0.9083094555873925
0.9083094555873925 x 100 = 90.83%