27.38% is the change from 409 to 521
Calculation steps:
[( 521 - 409 ) ÷ 409] x 100 = 27.38%
Formula
Percentage change = [(521 - 409) / 409] x 100
Subtract the new number by the original number
521 - 409 = 112
112 ÷ 409 = 0.27383863080684595
0.27383863080684595 x 100 = 27.38%