50.91% is the change from 440 to 664
Calculation steps:
[( 664 - 440 ) ÷ 440] x 100 = 50.91%
Formula
Percentage change = [(664 - 440) / 440] x 100
Subtract the new number by the original number
664 - 440 = 224
224 ÷ 440 = 0.509090909090909
0.509090909090909 x 100 = 50.91%