975% is the change from 8 to 86
Calculation steps:
[( 86 - 8 ) ÷ 8] x 100 = 975%
Formula
Percentage change = [(86 - 8) / 8] x 100
Subtract the new number by the original number
86 - 8 = 78
78 ÷ 8 = 9.75
9.75 x 100 = 975%
Example