339.06% is the change from 64 to 281
Calculation steps:
[( 281 - 64 ) ÷ 64] x 100 = 339.06%
Formula
Percentage change = [(281 - 64) / 64] x 100
Subtract the new number by the original number
281 - 64 = 217
217 ÷ 64 = 3.390625
3.390625 x 100 = 339.06%