136.99% is the change from 346 to 820
Calculation steps:
[( 820 - 346 ) ÷ 346] x 100 = 136.99%
Formula
Percentage change = [(820 - 346) / 346] x 100
Subtract the new number by the original number
820 - 346 = 474
474 ÷ 346 = 1.369942196531792
1.369942196531792 x 100 = 136.99%