27.02% is the change from 507 to 644
Calculation steps:
[( 644 - 507 ) ÷ 507] x 100 = 27.02%
Formula
Percentage change = [(644 - 507) / 507] x 100
Subtract the new number by the original number
644 - 507 = 137
137 ÷ 507 = 0.2702169625246548
0.2702169625246548 x 100 = 27.02%