4787.5% is the change from 8 to 391
Calculation steps:
[( 391 - 8 ) ÷ 8] x 100 = 4787.5%
Formula
Percentage change = [(391 - 8) / 8] x 100
Subtract the new number by the original number
391 - 8 = 383
383 ÷ 8 = 47.875
47.875 x 100 = 4787.5%
Example