142.6% is the change from 338 to 820
Calculation steps:
[( 820 - 338 ) ÷ 338] x 100 = 142.6%
Formula
Percentage change = [(820 - 338) / 338] x 100
Subtract the new number by the original number
820 - 338 = 482
482 ÷ 338 = 1.4260355029585798
1.4260355029585798 x 100 = 142.6%