3.56% is the change from 505 to 523
Calculation steps:
[( 523 - 505 ) ÷ 505] x 100 = 3.56%
Formula
Percentage change = [(523 - 505) / 505] x 100
Subtract the new number by the original number
523 - 505 = 18
18 ÷ 505 = 0.03564356435643564
0.03564356435643564 x 100 = 3.56%