3.54% is the change from 509 to 527
Calculation steps:
[( 527 - 509 ) ÷ 509] x 100 = 3.54%
Formula
Percentage change = [(527 - 509) / 509] x 100
Subtract the new number by the original number
527 - 509 = 18
18 ÷ 509 = 0.03536345776031434
0.03536345776031434 x 100 = 3.54%