298.06% is the change from 206 to 820
Calculation steps:
[( 820 - 206 ) ÷ 206] x 100 = 298.06%
Formula
Percentage change = [(820 - 206) / 206] x 100
Subtract the new number by the original number
820 - 206 = 614
614 ÷ 206 = 2.9805825242718447
2.9805825242718447 x 100 = 298.06%