-15.58% is the change from 661 to 558
Calculation steps:
[( 558 - 661 ) ÷ 661] x 100 = -15.58%
Formula
Percentage change = [(558 - 661) / 661] x 100
Subtract the new number by the original number
558 - 661 = -103
-103 ÷ 661 = -0.15582450832072617
-0.15582450832072617 x 100 = -15.58%