20.22% is the change from 549 to 660
Calculation steps:
[( 660 - 549 ) ÷ 549] x 100 = 20.22%
Formula
Percentage change = [(660 - 549) / 549] x 100
Subtract the new number by the original number
660 - 549 = 111
111 ÷ 549 = 0.20218579234972678
0.20218579234972678 x 100 = 20.22%