16.61% is the change from 548 to 639
Calculation steps:
[( 639 - 548 ) ÷ 548] x 100 = 16.61%
Formula
Percentage change = [(639 - 548) / 548] x 100
Subtract the new number by the original number
639 - 548 = 91
91 ÷ 548 = 0.16605839416058393
0.16605839416058393 x 100 = 16.61%