4187.5% is the change from 8 to 343
Calculation steps:
[( 343 - 8 ) ÷ 8] x 100 = 4187.5%
Formula
Percentage change = [(343 - 8) / 8] x 100
Subtract the new number by the original number
343 - 8 = 335
335 ÷ 8 = 41.875
41.875 x 100 = 4187.5%
Example