21.23% is the change from 504 to 611
Calculation steps:
[( 611 - 504 ) ÷ 504] x 100 = 21.23%
Formula
Percentage change = [(611 - 504) / 504] x 100
Subtract the new number by the original number
611 - 504 = 107
107 ÷ 504 = 0.2123015873015873
0.2123015873015873 x 100 = 21.23%