4455.56% is the change from 18 to 820
Calculation steps:
[( 820 - 18 ) ÷ 18] x 100 = 4455.56%
Formula
Percentage change = [(820 - 18) / 18] x 100
Subtract the new number by the original number
820 - 18 = 802
802 ÷ 18 = 44.55555555555556
44.55555555555556 x 100 = 4455.56%