439.06% is the change from 64 to 345
Calculation steps:
[( 345 - 64 ) ÷ 64] x 100 = 439.06%
Formula
Percentage change = [(345 - 64) / 64] x 100
Subtract the new number by the original number
345 - 64 = 281
281 ÷ 64 = 4.390625
4.390625 x 100 = 439.06%