5.15% is the change from 505 to 531
Calculation steps:
[( 531 - 505 ) ÷ 505] x 100 = 5.15%
Formula
Percentage change = [(531 - 505) / 505] x 100
Subtract the new number by the original number
531 - 505 = 26
26 ÷ 505 = 0.05148514851485148
0.05148514851485148 x 100 = 5.15%