4.97% is the change from 503 to 528
Calculation steps:
[( 528 - 503 ) ÷ 503] x 100 = 4.97%
Formula
Percentage change = [(528 - 503) / 503] x 100
Subtract the new number by the original number
528 - 503 = 25
25 ÷ 503 = 0.04970178926441352
0.04970178926441352 x 100 = 4.97%