29.28% is the change from 403 to 521
Calculation steps:
[( 521 - 403 ) ÷ 403] x 100 = 29.28%
Formula
Percentage change = [(521 - 403) / 403] x 100
Subtract the new number by the original number
521 - 403 = 118
118 ÷ 403 = 0.29280397022332505
0.29280397022332505 x 100 = 29.28%