428.13% is the change from 64 to 338
Calculation steps:
[( 338 - 64 ) ÷ 64] x 100 = 428.13%
Formula
Percentage change = [(338 - 64) / 64] x 100
Subtract the new number by the original number
338 - 64 = 274
274 ÷ 64 = 4.28125
4.28125 x 100 = 428.13%
Example