331.58% is the change from 190 to 820
Calculation steps:
[( 820 - 190 ) ÷ 190] x 100 = 331.58%
Formula
Percentage change = [(820 - 190) / 190] x 100
Subtract the new number by the original number
820 - 190 = 630
630 ÷ 190 = 3.3157894736842106
3.3157894736842106 x 100 = 331.58%