1023.29% is the change from 73 to 820
Calculation steps:
[( 820 - 73 ) ÷ 73] x 100 = 1023.29%
Formula
Percentage change = [(820 - 73) / 73] x 100
Subtract the new number by the original number
820 - 73 = 747
747 ÷ 73 = 10.232876712328768
10.232876712328768 x 100 = 1023.29%