51.25% is the change from 439 to 664
Calculation steps:
[( 664 - 439 ) ÷ 439] x 100 = 51.25%
Formula
Percentage change = [(664 - 439) / 439] x 100
Subtract the new number by the original number
664 - 439 = 225
225 ÷ 439 = 0.5125284738041003
0.5125284738041003 x 100 = 51.25%