77.94% is the change from 349 to 621
Calculation steps:
[( 621 - 349 ) ÷ 349] x 100 = 77.94%
Formula
Percentage change = [(621 - 349) / 349] x 100
Subtract the new number by the original number
621 - 349 = 272
272 ÷ 349 = 0.7793696275071633
0.7793696275071633 x 100 = 77.94%