3712.5% is the change from 8 to 305
Calculation steps:
[( 305 - 8 ) ÷ 8] x 100 = 3712.5%
Formula
Percentage change = [(305 - 8) / 8] x 100
Subtract the new number by the original number
305 - 8 = 297
297 ÷ 8 = 37.125
37.125 x 100 = 3712.5%
Example