3787.5% is the change from 8 to 311
Calculation steps:
[( 311 - 8 ) ÷ 8] x 100 = 3787.5%
Formula
Percentage change = [(311 - 8) / 8] x 100
Subtract the new number by the original number
311 - 8 = 303
303 ÷ 8 = 37.875
37.875 x 100 = 3787.5%
Example