687.5% is the change from 64 to 504
Calculation steps:
[( 504 - 64 ) ÷ 64] x 100 = 687.5%
Formula
Percentage change = [(504 - 64) / 64] x 100
Subtract the new number by the original number
504 - 64 = 440
440 ÷ 64 = 6.875
6.875 x 100 = 687.5%
Example