-17.1% is the change from 661 to 548
Calculation steps:
[( 548 - 661 ) ÷ 661] x 100 = -17.1%
Formula
Percentage change = [(548 - 661) / 661] x 100
Subtract the new number by the original number
548 - 661 = -113
-113 ÷ 661 = -0.17095310136157338
-0.17095310136157338 x 100 = -17.1%