-13.1% is the change from 641 to 557
Calculation steps:
[( 557 - 641 ) ÷ 641] x 100 = -13.1%
Formula
Percentage change = [(557 - 641) / 641] x 100
Subtract the new number by the original number
557 - 641 = -84
-84 ÷ 641 = -0.1310452418096724
-0.1310452418096724 x 100 = -13.1%