29.88% is the change from 492 to 639
Calculation steps:
[( 639 - 492 ) ÷ 492] x 100 = 29.88%
Formula
Percentage change = [(639 - 492) / 492] x 100
Subtract the new number by the original number
639 - 492 = 147
147 ÷ 492 = 0.29878048780487804
0.29878048780487804 x 100 = 29.88%