698.44% is the change from 64 to 511
Calculation steps:
[( 511 - 64 ) ÷ 64] x 100 = 698.44%
Formula
Percentage change = [(511 - 64) / 64] x 100
Subtract the new number by the original number
511 - 64 = 447
447 ÷ 64 = 6.984375
6.984375 x 100 = 698.44%