20.95% is the change from 549 to 664
Calculation steps:
[( 664 - 549 ) ÷ 549] x 100 = 20.95%
Formula
Percentage change = [(664 - 549) / 549] x 100
Subtract the new number by the original number
664 - 549 = 115
115 ÷ 549 = 0.20947176684881602
0.20947176684881602 x 100 = 20.95%