6287.5% is the change from 8 to 511
Calculation steps:
[( 511 - 8 ) ÷ 8] x 100 = 6287.5%
Formula
Percentage change = [(511 - 8) / 8] x 100
Subtract the new number by the original number
511 - 8 = 503
503 ÷ 8 = 62.875
62.875 x 100 = 6287.5%
Example