25.79% is the change from 508 to 639
Calculation steps:
[( 639 - 508 ) ÷ 508] x 100 = 25.79%
Formula
Percentage change = [(639 - 508) / 508] x 100
Subtract the new number by the original number
639 - 508 = 131
131 ÷ 508 = 0.2578740157480315
0.2578740157480315 x 100 = 25.79%