557.81% is the change from 64 to 421
Calculation steps:
[( 421 - 64 ) ÷ 64] x 100 = 557.81%
Formula
Percentage change = [(421 - 64) / 64] x 100
Subtract the new number by the original number
421 - 64 = 357
357 ÷ 64 = 5.578125
5.578125 x 100 = 557.81%