9887.5% is the change from 8 to 799
Calculation steps:
[( 799 - 8 ) ÷ 8] x 100 = 9887.5%
Formula
Percentage change = [(799 - 8) / 8] x 100
Subtract the new number by the original number
799 - 8 = 791
791 ÷ 8 = 98.875
98.875 x 100 = 9887.5%
Example