97.71% is the change from 349 to 690
Calculation steps:
[( 690 - 349 ) ÷ 349] x 100 = 97.71%
Formula
Percentage change = [(690 - 349) / 349] x 100
Subtract the new number by the original number
690 - 349 = 341
341 ÷ 349 = 0.9770773638968482
0.9770773638968482 x 100 = 97.71%