373.99% is the change from 173 to 820
Calculation steps:
[( 820 - 173 ) ÷ 173] x 100 = 373.99%
Formula
Percentage change = [(820 - 173) / 173] x 100
Subtract the new number by the original number
820 - 173 = 647
647 ÷ 173 = 3.739884393063584
3.739884393063584 x 100 = 373.99%