903.13% is the change from 64 to 642
Calculation steps:
[( 642 - 64 ) ÷ 64] x 100 = 903.13%
Formula
Percentage change = [(642 - 64) / 64] x 100
Subtract the new number by the original number
642 - 64 = 578
578 ÷ 64 = 9.03125
9.03125 x 100 = 903.13%
Example