812.5% is the change from 8 to 73
Calculation steps:
[( 73 - 8 ) ÷ 8] x 100 = 812.5%
Formula
Percentage change = [(73 - 8) / 8] x 100
Subtract the new number by the original number
73 - 8 = 65
65 ÷ 8 = 8.125
8.125 x 100 = 812.5%
Example