720% is the change from 100 to 820
Calculation steps:
[( 820 - 100 ) ÷ 100] x 100 = 720%
Formula
Percentage change = [(820 - 100) / 100] x 100
Subtract the new number by the original number
820 - 100 = 720
720 ÷ 100 = 7.2
7.2 x 100 = 720%
Example