-16.99% is the change from 671 to 557
Calculation steps:
[( 557 - 671 ) ÷ 671] x 100 = -16.99%
Formula
Percentage change = [(557 - 671) / 671] x 100
Subtract the new number by the original number
557 - 671 = -114
-114 ÷ 671 = -0.16989567809239942
-0.16989567809239942 x 100 = -16.99%