2.57% is the change from 506 to 519
Calculation steps:
[( 519 - 506 ) ÷ 506] x 100 = 2.57%
Formula
Percentage change = [(519 - 506) / 506] x 100
Subtract the new number by the original number
519 - 506 = 13
13 ÷ 506 = 0.025691699604743084
0.025691699604743084 x 100 = 2.57%