28.06% is the change from 499 to 639
Calculation steps:
[( 639 - 499 ) ÷ 499] x 100 = 28.06%
Formula
Percentage change = [(639 - 499) / 499] x 100
Subtract the new number by the original number
639 - 499 = 140
140 ÷ 499 = 0.280561122244489
0.280561122244489 x 100 = 28.06%