-16.19% is the change from 661 to 554
Calculation steps:
[( 554 - 661 ) ÷ 661] x 100 = -16.19%
Formula
Percentage change = [(554 - 661) / 661] x 100
Subtract the new number by the original number
554 - 661 = -107
-107 ÷ 661 = -0.16187594553706505
-0.16187594553706505 x 100 = -16.19%