725% is the change from 8 to 66
Calculation steps:
[( 66 - 8 ) ÷ 8] x 100 = 725%
Formula
Percentage change = [(66 - 8) / 8] x 100
Subtract the new number by the original number
66 - 8 = 58
58 ÷ 8 = 7.25
7.25 x 100 = 725%
Example