40.75% is the change from 454 to 639
Calculation steps:
[( 639 - 454 ) ÷ 454] x 100 = 40.75%
Formula
Percentage change = [(639 - 454) / 454] x 100
Subtract the new number by the original number
639 - 454 = 185
185 ÷ 454 = 0.40748898678414097
0.40748898678414097 x 100 = 40.75%