147.73% is the change from 331 to 820
Calculation steps:
[( 820 - 331 ) ÷ 331] x 100 = 147.73%
Formula
Percentage change = [(820 - 331) / 331] x 100
Subtract the new number by the original number
820 - 331 = 489
489 ÷ 331 = 1.4773413897280967
1.4773413897280967 x 100 = 147.73%