27.9% is the change from 509 to 651
Calculation steps:
[( 651 - 509 ) ÷ 509] x 100 = 27.9%
Formula
Percentage change = [(651 - 509) / 509] x 100
Subtract the new number by the original number
651 - 509 = 142
142 ÷ 509 = 0.27897838899803534
0.27897838899803534 x 100 = 27.9%