837.5% is the change from 8 to 75
Calculation steps:
[( 75 - 8 ) ÷ 8] x 100 = 837.5%
Formula
Percentage change = [(75 - 8) / 8] x 100
Subtract the new number by the original number
75 - 8 = 67
67 ÷ 8 = 8.375
8.375 x 100 = 837.5%
Example