382.35% is the change from 170 to 820
Calculation steps:
[( 820 - 170 ) ÷ 170] x 100 = 382.35%
Formula
Percentage change = [(820 - 170) / 170] x 100
Subtract the new number by the original number
820 - 170 = 650
650 ÷ 170 = 3.823529411764706
3.823529411764706 x 100 = 382.35%