39.43% is the change from 459 to 640
Calculation steps:
[( 640 - 459 ) ÷ 459] x 100 = 39.43%
Formula
Percentage change = [(640 - 459) / 459] x 100
Subtract the new number by the original number
640 - 459 = 181
181 ÷ 459 = 0.39433551198257083
0.39433551198257083 x 100 = 39.43%