2.75% is the change from 509 to 523
Calculation steps:
[( 523 - 509 ) ÷ 509] x 100 = 2.75%
Formula
Percentage change = [(523 - 509) / 509] x 100
Subtract the new number by the original number
523 - 509 = 14
14 ÷ 509 = 0.0275049115913556
0.0275049115913556 x 100 = 2.75%