-15.17% is the change from 646 to 548
Calculation steps:
[( 548 - 646 ) ÷ 646] x 100 = -15.17%
Formula
Percentage change = [(548 - 646) / 646] x 100
Subtract the new number by the original number
548 - 646 = -98
-98 ÷ 646 = -0.15170278637770898
-0.15170278637770898 x 100 = -15.17%