862.5% is the change from 8 to 77
Calculation steps:
[( 77 - 8 ) ÷ 8] x 100 = 862.5%
Formula
Percentage change = [(77 - 8) / 8] x 100
Subtract the new number by the original number
77 - 8 = 69
69 ÷ 8 = 8.625
8.625 x 100 = 862.5%
Example