329.69% is the change from 64 to 275
Calculation steps:
[( 275 - 64 ) ÷ 64] x 100 = 329.69%
Formula
Percentage change = [(275 - 64) / 64] x 100
Subtract the new number by the original number
275 - 64 = 211
211 ÷ 64 = 3.296875
3.296875 x 100 = 329.69%