144.05% is the change from 336 to 820
Calculation steps:
[( 820 - 336 ) ÷ 336] x 100 = 144.05%
Formula
Percentage change = [(820 - 336) / 336] x 100
Subtract the new number by the original number
820 - 336 = 484
484 ÷ 336 = 1.4404761904761905
1.4404761904761905 x 100 = 144.05%