640.58% is the change from 69 to 511
Calculation steps:
[( 511 - 69 ) ÷ 69] x 100 = 640.58%
Formula
Percentage change = [(511 - 69) / 69] x 100
Subtract the new number by the original number
511 - 69 = 442
442 ÷ 69 = 6.405797101449275
6.405797101449275 x 100 = 640.58%