2828.57% is the change from 28 to 820
Calculation steps:
[( 820 - 28 ) ÷ 28] x 100 = 2828.57%
Formula
Percentage change = [(820 - 28) / 28] x 100
Subtract the new number by the original number
820 - 28 = 792
792 ÷ 28 = 28.285714285714285
28.285714285714285 x 100 = 2828.57%