3.35% is the change from 508 to 525
Calculation steps:
[( 525 - 508 ) ÷ 508] x 100 = 3.35%
Formula
Percentage change = [(525 - 508) / 508] x 100
Subtract the new number by the original number
525 - 508 = 17
17 ÷ 508 = 0.03346456692913386
0.03346456692913386 x 100 = 3.35%