30.41% is the change from 490 to 639
Calculation steps:
[( 639 - 490 ) ÷ 490] x 100 = 30.41%
Formula
Percentage change = [(639 - 490) / 490] x 100
Subtract the new number by the original number
639 - 490 = 149
149 ÷ 490 = 0.3040816326530612
0.3040816326530612 x 100 = 30.41%