134.96% is the change from 349 to 820
Calculation steps:
[( 820 - 349 ) ÷ 349] x 100 = 134.96%
Formula
Percentage change = [(820 - 349) / 349] x 100
Subtract the new number by the original number
820 - 349 = 471
471 ÷ 349 = 1.3495702005730659
1.3495702005730659 x 100 = 134.96%