7200% is the change from 7 to 511
Calculation steps:
[( 511 - 7 ) ÷ 7] x 100 = 7200%
Formula
Percentage change = [(511 - 7) / 7] x 100
Subtract the new number by the original number
511 - 7 = 504
504 ÷ 7 = 72
72 x 100 = 7200%
Example