912.5% is the change from 64 to 648
Calculation steps:
[( 648 - 64 ) ÷ 64] x 100 = 912.5%
Formula
Percentage change = [(648 - 64) / 64] x 100
Subtract the new number by the original number
648 - 64 = 584
584 ÷ 64 = 9.125
9.125 x 100 = 912.5%
Example