515.63% is the change from 64 to 394
Calculation steps:
[( 394 - 64 ) ÷ 64] x 100 = 515.63%
Formula
Percentage change = [(394 - 64) / 64] x 100
Subtract the new number by the original number
394 - 64 = 330
330 ÷ 64 = 5.15625
5.15625 x 100 = 515.63%
Example